Hi, this is the second time I'm writing this post, try to do it just a couple of minutes ago but it happend again, the BSOD.. anyway, I keep getting BSOD randomly, some days only once other 3-4 times. I have no idea why. My computer is a dell optiplex 170l with default factory settings and Win XP sp2, ie no overclocking or such.. I looked into the minidump files with the WinDbg and from the little I know I figure it is a memory reference that goes bad. What concerns me is that from what I can see the problem is in the ntkernel, which I supose is a vital part of the OS.. I'll post a couple of my minidumps and hope that someone have an idea on what I can do! Neiden :edit: turned off hyper threading today but it didn't make any difference got a BSOD an hour or so later..