well you can download a program called ac utilities from this website
http://www.acelogix.com/
that program is
The most advanced registry cleaner to clean windows registry.
Clean unneeded junk, temp and obsolete files from your disks using disk cleaner.
Clean browser and application history, cache, temp files, cookies etc.
Control the applications that start automatically with Windows, using startup organizer.
Fix broken start menu and desktop shortcuts.
Remove true duplicate files.
Uninstall applications correctly.
its a trial version so use it for 30 days...
