Hi there, my PC started to crash with a bsod yesterday PC is Win7 64bit on E8400, 4GB G-Skill RAM, HD4870, GA-EP45DS3, several Samsung HDD The first time it was yesterday while opening a pdf my boss sent me in Opera 11 with thepdfxchange viewer plugin. The second time a restart later when I checked if it was recreatable - it was. Today it crashed again while choosing another pdf to send per mail and again while trying to pack it into a .zip to see if that would change the behaviour. After that Win7 goes BSOD simply after some minutes after boot - only safe mode without networking seems to work longer. Every bluescreen was BAD_POOL_HEADER stop 0x00[...]019 I attached the three dumpfiles from the first crashes and the very last one and the debug logs I created make from these with the Microsoft debugging tools. Hopefully, someone here is able to help me. Nearly forgot: I ran memtest86+ for one complete pass without errors.