This is the link here: http://answers.microsoft.com/en-us/w...2-392616b30728
It requires an alteration to the registry, so make sure you export it first. From the command line you can do that with
regedit /e C:\fullregistry.reg
which will dump the registry on the C drive with the name fullregistry.reg. Do that first in case something goes horribly wrong; you can boot to safe mode with F8 and restore the registry from there (simply double click it, or in the registry menu you can import).
Check this link out too: http://answers.microsoft.com/en-us/w...4-cae994e1768f
It involves steps of recovering the registry, although it looks like this one takes from a shadow (actually it looks like windows does it for you by selecting repair (I've never seen this in windows 7 before). How nice).
I lied, it looks more difficult and involves restoration of files by examining the dates. Too bad; just keep the registry export instead (I doubt you'll have a problem with that edit).