heres my problem, about say 3 wks ago..noticed that my cpu after I had left it on overnighnt would not let me get into any browser or files..when tried to open yahoo browser, told me that cannot open ..not enough space..when tried to open other files would tell me cannot find file..would not even let me shut down properly had to shut down with start button...after turned back on..would tell me windows did not shut down properly..after that goes to blue screen and has heading ..INVALID KERNAL HANDLE. then tells me if this is frist time..shut down cpu..restart..if not ..delete latest hardware or software added...did that..deleted some latest software files..when cpu goes back on all is fine..no problems..this only happens when I leave the cpu on with out touching it for say overnight..or after certain hours..say..over 7 ..then have to do this process again..sometimes it takes about 2 times to restart because it goes back to blue screen..same message..then back to notice that windows did not shut down proeperly..then reboots..goes to windows..then starts up..if anyone could help me with this delema would apprecoiate this very much..question: would doing a backup and restore help...?