Hi, after three days, I got a new BSOD. This is realy frustrating, two or three days PC runs normaly, and then I got three or four BSOD per day. Here are my minidump files. I did everything that You said in my last post: 1) Disable Driver Verifier. It's not needed here. 2) Update the VIA HD Audio driver: viahduaa viahduaa.sys Thu Mar 26 12:28:08 2009 VIA Drivers 3) Update the Atheros lan driver from motherboard website: L1E62x64 L1E62x64.sys Thu Jun 11 02:45:22 2009 4) Navigate to C:\Windows\System32\drivers and delete this driver: pcouffin pcouffin.sys Tue Dec 05 09:39:30 2006 Reboot. Thanks in advance.