Tweaking.com - Windows Repair can do the following:
· Reset Registry Permissions
· Reset File Permissions
· Register System Files
· Repair WMI
· Repair Windows Firewall
· Repair Internet Explorer
· Repair MDAC & MS Jet
· Repair Hosts File
· Remove Policies Set By Infections
· Repair Icons
· Repair Winsock & DNS Cache
· Remove Temp Files
· Repair Proxy Settings
· Unhide Non System Files
· Repair Windows Updates
· Repair CD/DVD Missing/Not Working