Disk Defragmenter helps Windows arrange files on your Hard Disk in a way that makes it easier and faster for it to find your programs.

From the Start menu, click on Programs> Accessories> SystemTools> Disk Defragmenter.

It is recommended that you read the Defragmenter Help manual before beginning the defragmentation process. Click on Help from the menu at the top of the Disk Defragmenter window.

Defragmenting can take anything from a few minutes to several hours depending how fragmented the disk is, during which time you should not run any other programs.

Disk Defragmenter requires 15% of free space on your hard disk to work with. If you do not have enough space you will need to delete some files. To start the defragmentation process, click the volume that you want to defragment, and then click Defragment.

The Disk Cleanup system tool allows you to clean out Windows components and programs you no longer need, and remove temporary files.

From the Start menu, click on Programs> Accessories> SystemTools> Disk Cleanup.

The main Disk Cleanup window shows two tabs - Disk Cleanup and More Options. In the Disk Cleanup tab window, put a tick in the following boxes if you wish to clean out these unnecessary files:

Click on the More Options tab and you can choose to get rid of unwanted Windows components, remove installed programs you no longer use, and remove all but the most recent System restore point.

When you have selected everything you want to clean up, click on OK then Yes to confirm you want to begin the Disk Cleanup process.

Computer virus program negatively affects the working of a computer by altering user data or information without the permission or knowledge of its actual user. But you can prevent your computer data and resources from viruses, if you follow the given tips and tricks.

• Never open unknown e-mail messages, and always scan first all email before downloading even if you know the sender of the message.
• You should minimize the data transfer between computers through use of USB drives and MP3 player, if it is necessary then always scan first before open it.
• While using the Internet, avoid downloading free ware software without first checking it for virus. Normally the key generator sites are the main source of virus.
• Always use antivirus program with latest version, to detect and remove viruses from your system. You should update antivirus program periodically, because older versions of antivirus may not remove the new viruses.
• Always keep backup your important data, because your can restore your data using backup if a virus deletes your data or modifies it.

Internet Explorer stores many of the files used on the web pages you visit so that next time you go to a site it doesn’t have to download the same files again. However, this can build up over time and take up a lot of disk space eventually slow your PC down..

IE 6:

• Click on Tools then Internet Options.
• Go to Temporary Internet Files on the General tab
• Click Delete Files. Delete all content and click OK.
• Funally, click OK to exit the Internet Options window.

IE 7:

• Click on Tools then Internet Options.
• Go to the section Browsing History
• Click Delete Button.
• Click Delete Files next to Temporary Internet Files.
• Funally, click OK to exit the Internet Options window.