I was tring to install some hp software and was getting msi errors. So reading there forum it was suggested to delete the temp file. With that said i deleted all variables. now can not restore or msconfig regediet or anything with anti virus. I hope i can fix this mess, with your help. running windows 7 ultimate. I tried to rerun setup disk . error variable command not found. so i can not even run a cd or dvd. Also lost admin rights.
More aboutlost environment variables
Solved: used f8 on bootup then used sysyem restore to an earlier date!