Microsoft is providing free application(troubleshooters) inorder to fix most of the issues in Vista \ XP. This troubleshooter is availabe by default in Win 7 OS(Control panel - Action centre - Troubleshooting \ Troubleshooters). As it is not availabe by default in XP \ Vista, we can download this application.
     Upon installation of the Fix it Center client, it automatically downloads the latest troubleshooters in our library to your PC. The troubleshooters can “find and fix” issues immediately or “find and notify” you of the issues it detected. The “find and notify” puts you in control – you decide which issues you want the troubleshooters to resolve. No matter what you choose, we show you a report of what was performed on your PC and offer you options to learn or further investigate the issue or submit a support request at Fix it Center Online.
     Fix it Center can be installed on:

•Windows XP SP3
•Windows XP Pro (64-bit) SP2
•Windows Vista
•Windows 7
•Windows Server 2003 SP2
•Windows Server 2008
•Windows Server 2008 R2

Refer http://tinyurl.com/mskfixitcenter for more details