I installed Windows 7 over the top of XP and it left me with a 'Windows.old' folder.
I tried to delete it, and it got rid of everything except 2 files named:
ЃϵϳЅЂϿϽϯІχϯπρϴϱЄϱЃϵϳЅ
ЃϵϳЅЂϿϽϯІχϯπρЂϻϵЉЃϵϳЅ
From what I see on Google this has happened to others before. Apparently nothing short of booting up with Linux will solve this??

