I uninstalled a couple of toolbars for Firefox the other day using the Uninstaller in Advanced System Care 5. I think it was the Power Clean utility which has caused the problem. Now I cant access any of my folders or shortcuts on my desktop or in the Start Menu (Control Panel, My Computer, Documents etc.) the msg 'no such interface supported' pops up. The USB connections are not working either. All non windows programs are working fine such as Mozilla, Bit Torrent, Picasa and Wifi. Do I need to reinstall Windows 7 to fix the problem and will reinstalling Windows wipe all my data of my hard drives? I returned the computer to the previous restore point but it had no effect. What should I do?