I have no clue what exactly your talking about. And no, sadly I didn't make a backup. Edit: Tried system backup. Turns out it is also a .exe file so doesn't work either.
So I was fixing something with Regedit and I know I typed something in by mistake because now my system won't open any .exe program. That includes regedit so I don't know how to fix it. Help, Please? I have Windows 7.