Looking for some help on a computer problem. I have had this setup for maybe past four years. Intel Q 6600 quad Asus p5ne sli Wd 7200 sata hd 8 gb ram 2- 8600 and 1 - 8400 video cards 650 watt ps Windows 7 64 bit Pro I had posted this build here some years ago but since changed the hard dive and OS and power supply after original ps died. This setup has always run great until recently. It is starting to experience complete freeze ups. Once frozen I cannot do anything at all to free it up. Cannot access task manager, c drive, not a thing... completely unable to use keyboard and mouse. Forced to re boot to operate normally again, but then I lose all work that was not saved at the time. Finally decided to just re install the OS and start over thinking this would clear up the problem. Backed up all important files and installed W 7 again. Appeared to run fine for days until today it crashed twice with complete freezing unable to access anything, mouse and keyboard useless. Does anyone have an idea what may cause this problem? Is there something I can look at that may help me to understand or diagnose the problem ? I don't know if it could be a motherboard problem, hard drive, or software but after reinstalling windows I think I can eliminate the OS as the problem. Greatly appreciate any advice. I will be out until tomorrow evening and then I wil respond to feedback posted. Its a real bummer to have all charting and brokers running then suddenly freeze losing most recent work. Thanks so much to any help.