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Topics - Mahbub

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« on: March 11, 2014, 04:16:28 PM »
It is common observation that some times our computer slows down due to low performance of hard drive. This problem happens due to the slow performance or poor speed of hard drive. When we say about poor performance, actually we mean, poor speed of reading/writing of hard drive. This problem can be solved by increasing the hard drive speed. Follow these steps to solve your problem.

Click Start menu and select run.
Now type (sysedit.exe) in run and press enter.
System configuration editor will appear.
Here you can see some multiple windows but you will select (system.ini).
This window contains a line (386enh)
Now after this line type (irq14=4096)
Now close this window and save it.
Reboot your computer now.
You will surely feel better performance of your computer.

IT Forum / Top 10 keyboard shortcuts everyone should know
« on: March 11, 2014, 03:44:00 PM »
Ctrl + C or Ctrl + Insert
Copy the highlighted text or selected item.

Ctrl + V or Shift + Insert
Paste the text or object that's in the clipboard.

Ctrl + Z and Ctrl + Y
Undo any change. For example, if you cut text, pressing this will undo it. This can also often be pressed multiple times to undo multiple changes. Pressing Ctrl + Y would redo the undo.

Ctrl + F
Open the Find in any program. This includes your Internet browser to find text on the current page.

Alt + Tab or Ctrl + Tab
Quickly switch between open programs moving forward.

Tip: Press Ctrl + Tab to switch between tabs in a program.
Tip: Adding the Shift key to Alt + Tab or Ctrl + Tab will move backwards. For example, if you are pressing Alt + Tab and pass the program you want to switch to, press Alt + Shift + Tab to move backwards to that program.

Tip: Windows Vista and 7 users can also press the Windows Key + Tab to switch through open programs in a full screenshot of the Window.

Ctrl + Back space and Ctrl + Left or Right arrow
Pressing Ctrl + Backspace will delete a full word at a time instead of a single character.

Holding down the Ctrl key while pressing the left or right arrow will move the cursor one word at a time instead of one character at a time. If you wanted to highlight one word at a time you can hold down Ctrl + Shift and then press the left or right arrow key to move one word at a time in that direction while highlighting each word.

Ctrl + S
While working on a document or other file in almost every program pressing Ctrl + S will save that file. This shortcut key should be used frequently anytime you're working on anything important.

Ctrl + Home or Ctrl + End
Move the cursor to the beginning or end of a document.

Ctrl + P
Print the page being viewed. For example, the document in Microsoft Word or the web page in your Internet browser.
Page Up, Space bar, and Page Down

Pressing either the page up or page down key will move that page one page at a time in that direction. When browsing the Internet pressing the space bar will also move the page down one page at a time. If you press Shift and the Space bar the page will go up a page at a time.

IT Forum / Setting DHCP Server via Winbox on Mikrotik PC Router
« on: April 30, 2013, 09:21:47 AM »
No doubt that providing static IP really inconvenient, especially a lot of PCs that will be set them IP. Because if there are same IP will also be conflict. Indeed there is a PC you should be given such a static IP just like a PC server and default gateway. Then another PC on the network just enough get automatic IP from the IP server called the DHCP server. DHCP is the Dynamic Host Configuration Protocol, service that will give automatic IP to the PC on the network imaginable. So the PC should not be turned off. If these pc is turned off then the other PC will lose the IP

On occasion this time, the following article will describe how to make the DHCP server configuration through Winbox on Mikrotik PC Router. Here are step by step to setting up DHCP Server Pc Router.

 Install MikrotikOs on your Pc router with two Ethernet card ( 1 Ethernet for internet connection (ether1) and 1 ethernet for Local connection (ether2)
Connect your pc router to Windows pc using utp cable, look at the picture below:
Set your IP Tab Menu IP------>Address---->Add

    Ip for interface ether1 for example:
    Ip for interface ether2 for example:
    look at the picture below:

    Set Gateway for your internet connection on interface ether1 (internet connection)

    For Example Ip Gateway:

    Set your DNS Server...IP.....>DNS----tab Setting

    For example DNS:

    Setting DHCP Server

    Name: dhcppool

    IP------DHCP Server----DHCP----Add
    Name: dhcpserver
    Interface: ether2
    Address pool: dhcppool

    IP----->DHCP Server---DHCP---Networks---Add
    DNS Server:

    on tab General:Chain: src-nat
    Out Interface: ether1
    On tab Action: Action: masquerade

Open Tab New Terminal to try your internet connection with Pc router DHCP Server

IT Forum / How to limit internet bandwidth usage on Mikrotik router
« on: April 25, 2013, 05:00:22 PM »

Suppose that you have a Mikrotik router which is routing both LAN and Internet packets. You want to limit the Internet bandwidth on some ports. On Mikrotik you can use Simple Queues to limit Both Transmit and Receive bandwidth. But there is no direct option in the Queue settings to limit just the Internet bandwidth, and whole network bandwidth including LAN will be limited on the configured ports.


There is a table in the firewall section named Mangle. One of the usages of  this table is  marking packets. In other words you can assign a label to packets according to desired rule. This will help you to make further decisions whole around the Firewall/Router.

Mangle table can be used to solve the problem. you must add a rule to this Table. Telnet to the Mikrotik or use it's GUI/Web interfaces go to IP -> Firewall -> Mangle add a new rule with following settings:

    chain = prerouting
    action = mark-packet
    new-packet-mark = Internet
    passthrough = yes

Here dst-address=! (Take note of the '!' mark at first) is a sample for your network. You must configure it based on you network settings. Also if you need to limit just some ports you must configure the Interface setting. Applying this rule will mark all packets whose destination is not to LAN.

After marking packets you can add a rule in the Simple Queue to limit bandwidth just for packets marked as Internet.

IT Forum / How to Test Internet Speed???
« on: February 28, 2013, 05:00:39 PM »
Why Is Internet Speed Important?

If you're browsing the web and pages take a while to load, or a video you want to watch has trouble playing, your Internet speed could be the cause. You can test your bandwidth though by using free websites.  These sites allow you to see if your connection matches up to what your Internet service provider promised you. Can Test Internet Speed

A free and trusted site is Simply load the site, and click the Begin Test button. Once this is clicked you'll get three results. Your ping speed, your download speed, and your upload speed. It's a good idea to test twice, or three times for best results. Your will likely end up with different results each time as activity on your network can influence your speed. The Speedtest results give you a general idea of what your connection speed is at the time. Ookla is the company behind and most of the other testing services as well.
Test Internet Speed With Your ISP

Another way to go about testing is to check your connection with your service provider. Your provider likely uses Ookla as well. The PC Support guide for has the major providers listed, you can go there to find your provider and your connection speed between it.
Use a Consumer Broadband Test to Test Internet Speed

The U.S. government also has a test you can use by going to Click on "Consumer Resources" and then on "Consumer Broadband Test". You'll have to fill out some information about where you are testing from first. This test is also provided by Ookla, and you'll need Java to run it. Once you enter your information you'll be able to begin a test. When you're done with your Ookla test you'll be asked if you'd also like to be tested by M-Lab. Try this too.

These tests are a great way for you to keep an eye on your connection speed, and they're easy and free. Remember though if you're downloading or uploading something you're bandwidth will be affected, so it's best to test when there's minimal activity on your network.

Thanks for reading.

IT Forum / 5 tips for troubleshooting PC system slowdowns
« on: February 27, 2013, 06:00:59 PM »
1: File system issues and display options

Some file systems work better than others for large disk partitions. Windows 7 should always use the NTFS file system for best performance.

Cleaning up the file system will also help speed performance. You can use the Disk Cleanup tool to:

    Remove temporary Internet files.
    Remove downloaded program files (such as Microsoft ActiveX controls and Java applets).
    Empty the Recycle Bin.
    Remove Windows temporary files such as error reports.
    Remove optional Windows components you don’t use.
    Remove installed programs you no longer use.
    Remove unused restore points and shadow copies from System Restore.

To run Disk Cleanup in Windows 7, click Start and type “Disk Cleanup” in the search box. Select the drive you want to clean up.

Another way to increase performance is by turning off some of the visual effects that make Windows 7 look cool but use valuable system resources. In Control Panel, click the System applet and in the left pane, click Advanced System Settings. Under Performance, click the Settings button and then the Visual Effects tab. Here, you can disable selected Aero effects or just click Adjust For Best Performance.

2. Background applications

Have you ever visited an end user’s desktop and noticed a dozen icons in the system tray? Each icon represents a process running in either the foreground or background. Most of them are running in the background, so the users may not be aware that they are running 20+ applications at the same time.

This is due to applications starting up automatically in the background. You can find these programs in the Startup tab of the System Configuration utility.

3. Disk fragmentation

As files are added, deleted, and changed on a disk, the contents of the file can become spread across sectors located in disparate regions of the disk. This is file fragmentation. All Windows operating systems subsequent to Windows NT have built-in disk defragmentation tools, but there are also third -party programs available that give you more options.

If you have traditional hard disks, disk fragmentation can significantly slow down your machine. The disk heads must move back and forth while seeking all the fragments of a file. A common cause of disk fragmentation is a disk that is too full. You should keep 20 percent to 25 percent of your hard disk space free to minimize file fragmentation and to improve the defragmenter’s ability to defrag the disk. So if a disk is too full, move some files off the drive and restart the defragmenter.

Note that SSDs work differently and can access any location on the drive in essentially the same amount of time. Thus, they don’t need to be defragmented.

4. BIOS settings

One frequently ignored cause of system slowdown is the machine’s BIOS settings. Most people accept the BIOS settings as they were configured in the factory and leave them as is. However, slowdowns may occur if the BIOS settings do not match the optimal machine configuration. Often, you can improve machine performance by researching your motherboard’s optimal BIOS settings, which may not be the same as the factory defaults.

There is no centralized database of optimal BIOS settings, but you can employ a search engine such as Google or Bing and use your motherboard name and BIOS as keywords to find the correct settings.

5. Disk type and interface

Once upon a time, buying a hard drive to work with your system was easy. Today, things are more complicated, with many types of drives available, offering differing levels of performance. Most modern motherboards will support more than one type.

For best performance, you may want to dump the old IDE PATA type drives and upgrade to SATA, which comes in several speeds  from 1.5 Gb/s to 6 Gb/s. Obviously, the faster drives will also be more expensive. Some new computers also have eSATA connectors for attaching a SATA drive externally. Other options for attaching drives externally include USB and Firewire/IEEE 1394.

Slowdowns may be caused by installing programs or often-used files on slow external drives. If you must use external drives for such files, go with the latest version, such as USB 3.0 (which is up to four times faster than USB 2.0) or Firewire 800. If you don’t have ports to support the faster version, you can install a card to add support.

New Solid State Drives (SSDs), which generally connect via SATA, can often provide better performance than other drive types, but cost much more per GB of storage space. Windows 7 includes support for TRIM, which optimizes SSD performance. SCSI drives are still around, too, notably in the form of Serial Attached SCSI (SAS) with super fast access times — but they’re expensive and noisy and used primarily for servers.

IT Forum / Laptop CPU Speed Control - Optimize Laptop Power Management
« on: February 26, 2013, 02:00:25 PM »

Many users don't know that processors are designed to save battery power and may have their CPU throttled down. Users may also experience shortened battery time because their CPU is running at its full speed. This tutorial shows you how to control your CPU to meet your needs.

Laptop CPU Control:

In order to conserve on battery usage, many laptops have CPU control that can be controlled in the BIOS. This control idles down the CPU (dynamic frequency scaling) when the laptop is unplugged from AC power and running on battery only. Modern operating systems also contain drivers and software “built-in” to allow the CPU to be throttled based on power settings in the operating system. This throttling not only conserves on battery power but also helps to lower CPU temperature.
CPU throttling affects application and operating systems performance. Power users may want to disable CPU throttling to gain the performance they need, whereas average users may want to enable CPU throttling to save on battery usage. Controlling CPU speed and power is based on an individual user’s needs and the applications she wants to run.

Power Management and CPU Control:

Microsoft's Windows XP has CPU management built in the power settings in the power management console. One way end users can regulate the CPU's speed is by changing the power schemes. Settings such as Home/Office Desk keep the processor speed at the normal rating. The Portable/Laptop power scheme ensures that the CPU will be idled down. When the power management is changed to Max Battery, this process will slow the CPU to lower levels as the laptop's battery becomes weaker.
Microsoft's Windows Vista has one of the most advanced power saving management features available. Much like in Windows XP, Windows Vista allows the user to adjust the power management features allowing the CPU (and other resources) to be throttled back or use less power.
Processor and Power:

CPUs today are manufactured with power conservation in mind. Both Intel and AMD contain information built in the processor to allow the processor to be used efficiently with mobile computing saving on battery life while giving the best performance. The line of mobile processors offered by these two chip manufacturing giants are designed for throttling offered by modern BIOS and operating systems.

Third Party Software:

SpeedswitchXP 1.52 is an excellent application that allows for the maximum control of CPU speed and control. This third party software insures that your CPU can step down and save power when needed or insure your computer is putting out its maximum speed. Although this software is more than three years old, it is still very effective and allows your computer's CPU to be controlled as necessary.
Other applications that detect CPU throttling are the RMClock Utility and CPU-Z. CPU-Z does not control throttling but allows the user to see the speed and details of their processor. CPU-Z in the pictures below shows power settings (before and after) that affect the CPU's performance.


A laptop's CPU speed and performance can be affected by the CPU's power settings or third party software. Users can weigh the options of power vs. battery savings after analyzing what programs are used and what speed (CPU power) is needed by the end user. These settings and third party software is a way to control your CPU based on your usage.

IT Forum / Top 10 Deadliest Computer Viruses
« on: February 26, 2013, 01:44:36 PM »
1. Nimda

Nimda (backwards for “admin”) is a top 10 deadliest computer virus since it is a malicious worm and file infector. It was originally released in 2001 and targeted Internet servers. The virus spread by use of e-mail, open network shares, compromised or “fake” websites, Internet Explorer 5.5 and by exploitation of Microsoft 4.0/5.0 directory vulnerabilities. If the virus was received by e-mail the message would appear blank. Once the computer was infected by any of these methods it created a backdoor and modified Web documents or executable files.

2.Storm Worm

The Storm Worm is a Trojan horse virus that affects computers that use Microsoft operating systems. It is spread by use of email attachment. Using catchy email headings like “Death Toll in China exceeding 100,000” it lured unsuspecting people into opening them. Once the attachment is opened, malware was installed that infected the computer and downloaded malicious packets which were spread to other computers. The computer is then made into a zombie “botnet” which becomes attached to the Storm Worm server and used to forward the virus to other computers. This nasty virus has affected major networks including Comcast and Roadrunner. It is considered one of the top 10 deadliest computer viruses since it cannot be detected by antivirus programs due to its encrypted design.

3. Bagle (Netsky)

Bagle (Netsky) is a malicious computer virus that can affect all versions of Microsoft Windows operating systems. It is thought to be created in Germany by using the assembly programming language. Bagle uses a SMTP engine to email itself on a massive scale. The email recipient will find the virus as an attachment. When opened it copies itself into the Windows system directory it opens TCP port 6777 or 8866. This creates a backdoor that provides remote access to the computer. It also spreads by using the infected computers e-mailing network. It was first discovered in January 2004. As of June 2010, the Bagle virus continues to remain a nuisance to computer users through new morphed versions.

4. SQL Slammer

SQL Slammer was a computer virus that caused denial of service (DDoS) and slowed down general Internet traffic. In 2003 over 75,000 machines were affected within 10 minutes. It worked by exploiting a bug in Microsoft SQL Server 2000 (which has since been updated).The SQL Slammer code generates random IP addresses and then sends itself out to those addresses. If a particular address is running a non-updated copy of the Microsoft SQL Server resolution service the computer becomes infected. The virus then spreads copies of itself on the Internet.

5. Code Red Virus

The Code Red virus attacked computers using Microsoft IIS 2.0 Web server and Windows 2000 indexing. The computers that were vulnerable to it used Microsoft Windows NT 4.0. The computer virus was released in July 2001. It worked by exploiting a vulnerability in the in the IIS indexing software. The result was defacement of websites which would display the following phrase: “HELLO! Welcome to! Hacked By Chinese!” It then would launch denial of service attacks (DDoS) about 30 days later on several IP addresses.


Top 10 Deadliest Computer Viruses No one would think that the phrase “I love you” would result in being one of the top 10 deadliest computer viruses. It originated in 2000 as an email to Windows computer users that included the subject heading “ILOVEYOU” along with a file attachment. After opening the attachment, the worm virus would send a copy of itself to every email address in the victims contact list by using the users sending address. It also made unwanted malicious changes to their system by overwriting files and making more copies of itself.

7. Leap or Oompa-Loompa Virus

This is a LAN spreading Trojan horse virus that affected Mac OS X operating systems. Once the computer was infected it altered application files. Discovered in 2006, the virus was spread over a local area network using the Bonjour iChat instant message program. The virus then attempts to prompt the user to login with the administrator password. If successful it infected the user’s software applications that were recently opened with a login password. After this the application programs would not open. The Leap virus was further spread by sending emails to all contacts in the users Bonjour buddy list.

8. MyDoom (Novars)

MyDoom is a top 10 deadliest computer virus worm since it affected users of Windows operating systems. It originated in 2004 and spread by email and through the Kazaa peer-to-peer network. The worm arrives as an email message attachment. It then created a backdoor by opening TCP ports 3127 through 3198. Once the computer was compromised, it accessed network resources. The virus was also designed to release a denial of service attack (DDoS).

9. The Klez Virus

Klez is a virus that behaved like a worm or a Trojan horse. Klez first arrived in 2001 as an email attachment targeted at computers that used Microsoft Windows operating systems. When opened, it stole all email addresses in the users contact list and on the compromised computer’s hard drive. The virus did not stop there. It infected program applications and disabled antivirus software. Then the virus waited for thirteen days, and corrupted the victim’s personal files and any network drive attached to their computer.

10. Melissa Virus

Melissa was the original top 10 deadliest computer viruses that appeared in the 1990’s. It was a macro virus that spread on Microsoft Word 97/2000 and Microsoft Excel 97/2000/20003 documents. It was first seen in the late 90’s. If an infected document was opened, the virus attempted to send out mass emails using the attached computer’s address book. It was also capable of deleting critical computer files. Other variations of the virus affected address books of Microsoft Outlook users or destroyed Excel documents. It was later discovered that the Melissa virus was the creation of David L. Smith. He was arrested and convicted to 20 months in prison in 1999. Ironically, he ended up working for the FBI to help them track down viruses and the people who created them. As for the Melissa virus, many variations became obsolete once it was discovered that it left traces of itself in the Windows Registry.

Prometric and VU testing Forum / About PearsonVUE Testing Center
« on: February 23, 2013, 04:56:15 PM »
About PearsonVUE . . .

PearsonVUE provides electronic testing to enhance the performance, reliability and security of high-stakes testing programs. Pearson VUE test centers administer millions of licensing, certification and admissions exams each year through the use of public and private testing sites.

Why Get IT Certified?

Numerous recent studies and surveys show that: IT Certification:

…demonstrates your expertise and gets you the recognition your skills deserve.

…proves you are proficient on the latest technology

…often means you have the best access to technical support.

…contributes to customer satisfaction

…can mean higher salaries and better job offers.

DIU PearsonVUE Testing

DIU has a public PearsonVUE test site. Testing is available 6 days a week except Friday at the Administrative Building Campus from 10am- 5 pm in Room 303(AB). The Testing Centers can accommodate multiple PearsonVUE test candidates at one time. Certified Test Administrators proctor scheduled exams for registered candidates in a secure, quiet and controlled test environment.

Available PearsonVUE Testing at DIU:

• Adobe
• Agilent Technologies
• Altiris
• American College
• Avaya Inc. Testing
• BMC Software
• Brocade Communications
• Business Objects
• Check Point Software Technologies
• Cisco Systems, Inc.
• CommVault Systems, Inc.
• CompTIA Testing
• Dassault Systemes/ CATIA
• EC-Council
• Global Association
• IBM Testing
• Investors Business Daily
• Linux Professional Institute Testing
• Lotus Testing
• MatrixOne
• Microsoft Dynamics
• National Instruments
• Novell Testing
• Pegasystems Inc
• Radware
• RSA Security Testing
• Siemens
• SITA, Inc.
• Sun Microsystems - SAI Program
• Telecommunications Industry Association
• Tivoli Testing
• VMware, Inc.

Test Preparation:

DIU also offers preparatory classes for the following tests:

DIU offers discount Measure Up practice tests for many tests including Microsoft and Cisco. The tests can be done in a study mode with hints and explanation or timed certification mode that closely mimics actual testing. For more info, please contact +8801713493097, +8801723597520.


All exam scheduling and registration is done online through the PearsonVUE website.

For more information, please contact

Daffodil International University
102, Sukrabad, Dhaka-1207
Land Phone: +880-2-9138234-5, Ext.:156
Cell: +88 01713493097, +8801723597520.

IT Forum / Know your all PC hardware info in one click
« on: February 23, 2013, 01:17:20 PM »
আজ আপনাদের জন্য নিয়ে এসেছি আপনার কম্পিউটারের সকল তথ্য জানার জন্য একটি বিশেষ সফট Hard Drive Inspector যা দিয়ে আপনি আপনার কম্পিউটারের সকল তথ্য এক ক্লিকেই জেনে নিতে পারেন এই জন্য প্রথমে আপনাকে এখান থেকে- ডাউনলোড করে নিতে হবে Hard Drive Inspector কে মাত্র ২.৯৮ মেগাবাইট। ডাউনলোড করার পর রার ফাইলকে এক্সট্রাক্ট করলেই পেয়ে যাবেন hddinsp নামের সেট আপ ফাইল ও নামের একটি প্যাচ ফাইল। প্রথমে সেট আপ ফাইল দিয়ে ইন্সটল করে নিন এবং ইন্সটল শেষে প্যাচ ফাইল কে কপি করে C ড্রাইভ ওপেন করে প্রোগ্রাম ফাইল এ প্রবেশ করুন সেখানে Hard Drive Inspector ফাইলকে ওপেন করে প্যাচ ফাইলকে পেস্ট করুন ও প্যাচ ফাইলে ডাবল ক্লিক করলেই প্যাচ সম্পুর্ন হয়েছে দেখাবে, ব্যাস কাজ শেষ।

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