Hi all. Sorry for my English.
I have serious strange problem.
I have two HP DC7800 workstations at home (Windows 7-64bit, e8400, hd6570, 4gb, one 500gb hdd, other 640gb hdd).
So, these computers hard working every day 24/7 (photoshop, premiere, outlook, etc.).
And..... about month ago i have had very bad surprise. In one hour i get 4 BSOD's from one machine!!! (after that time i don't have any bsod anymore)
received new email in outlook, answerred. BSOD.
restart automatically, loading windows, login- BSOD.
restart automatically, loading in safe mode- loading stops at classpnp.sys file.
turn computer off- turn computer on- loading normally, but at screen was only mouse cursor in black background.
turn off- turn on- finally loaded, everithing fine to the present. 5 days of work without any problems.
i have tested memory with Memtest for 20 passes. No errors.
i have tested CPU
with stress test. No errors.
I have checked HDD for errors, everything is good, no errors in SMART too.
i don't have any malware or viruses.
here is minidump files and some system information: click here
How do you thinking, it was hardware or software bsod's?
Thank you wery much.