First of all, I am not very good with computers and will probably be confused very easily so please bear with me. I recently tried to play an old version of a dos game (downloaded) and ended up screwing around with my computers autoexec.nt and config.nt files for some reason. Anyways..... I accidently changed what to open the file with in properties and now I am having all sorts of problems. How can I fix this file back to what it was before. I have already tried the system restore and that hasn't seemed to help. Any help would be great.