Run "check disk"

run registry repair software from here:

http://www.download.com/3120-20_4.html?qt=registry+repair+&tag=srch&tg=dl-20

These have risks, use them at your own risk. Get one that back up your data before making any changes.

You can access all your files by enabling "Desktop" on your toolbar. Right click a blank spot on your toolbar, choose "toolbars" on the applet, then click "Desktop". You now have something new on your toolbar, click the >> button, go to "computer" then your drive (usually C:), then program files. There they are. Choose one, open it then choose the .exe file extension. Some have more then one........your on with those/these. Proceed with these at your own risk.