Data Recovery

The given link here takes you to a site where you get to know about few data recovery and other tools.

http://recoverybull.com/

You may like to spend some time reading about various recovery software and seeing the demo.

Basic hardware troubleshooting

Following link contains documents with solutions to many of the frequently encountered problems. A good source of useful information.

http://www.computerhope.com/basic.htm

PC Maintenance

This article talks about two most important system tasks that can be performed without any additional cost and can help in keeping the PC in good performing condition.

http://www.thetechnologycoach.ca/new_page_2211.htm

Troubleshooting guide

Here is a link for Hardware troubleshooting guide. You will find the content very useful

http://www.everythingcomputers.com/troubleg.htm