I don't know whats going on with windows 7 professional but it keeps I guess you call it crashing, everything freezes including the mouse I get this strange "fast reverb" sound from speakers , I cant use " ctrl,alt,delete " to check for any programs that may be causing the problem, my only option is to shut down manually and restart., but when I restart I cant get online or run any programs. so I did a system restore, and everything was fine, this happened about every 2 hrs or so, at first I thought it was because of a windows update it kept trying to instal (internet explorer 11) so I blocked that update. and everything was fine for a couple days, then it did it again today and the system restore did not work.( there was no windows updates attempt) I shut down the comp for a few hrs, when I fired it back up it was fine.... this is getting real old very fast. plz see DxDiag and troubleshooting picture. Thank you I hope someone can help me