I was pushing too hard my CPU, Ram and mobo. Overclocked too much I guess. After a month of BSD etc finally the OS gave up. Gave me some chkdsk error and scanned and when it was about to go into logon screen said some file is missing and cannot validate password. Then re-boots enlessly. What is best way to do a restore installation. Unfortunately I don't have a ASR disk created with current OS settings. Thanks for your help.