Since 2 days, in a certain folder, I cant rename, move or delete folders or files. Now, it has spread to my desktop as well. If I rename a folder, even a new folder, the name changes ''magically'' within seconds to restore to its previous name. If I move the folder or file, it comes back and if I delete it, it restores. I tried to make a system restore, even format (!), the problem persists. HELP?!