After installing a game last night, I found myself unable to use my computer today. After trying all sorts of things for the past few hours I came to this site and I noticed a few other people have had the same problem as me and have had to re-install Windows.....I'm rambling now....I apologize.
I've done a stupid thing that I don't know how to undo. I renamed the "win.com" to "win.old", but I installed everything into C:\Windows.0000.
Is there anything I can do to fix it?