Thank u charon,but yes i installed all of those drivers,beside that i have sound blaster live sb0220(kx drivers) instead realtek onboard audio and additional realtek 100mb lan card(microsoft windows update drivers) for ICS sharing(don't have router:-/,bios is also updated i used MSI live utility to check if all drivers are up to date.Also installed latest 10.7 Catalist drivers for Saphire 4870 gpu. dx-is june 10th 2010 (web update) all of that was before bsod. in moment of bsod i had active GOM player watched movie,jdownloader in background and MSI dual core center (utility to show cpu temp etc) but turned it off after bsod it had tendances to crash.Putted CoreTemp32 instead. cool and quiet is only not installed,turned off in bios as well. OPS and antivirus is Eset Nod antivirus(not firewall included) firewall is off(windows),no aditional software for firewall is installed. if its of any consequence i also have Chieftek 850W,and memory modules are set in Ganged mode instead unganged. 2x1gb(geil - pair) and 2x2gb(patriot pair) PCI latency is set to 64(default) before i tried 128 but it was unstable,so returned to 64. Thank your wostaron for warm welcome :-) its amazing tool you people have on this site.