Hi I've just found this site and hope that someone can help me. I have read lots of threads and tried lots of different things, but still get random BSODs since upgrading to XP SP2. BSODs are one of three: MEMORY_MANAGEMENT IRQ NOT LESS OR EQUAL PAGE FAULT IN NON PAGED MEMORY I have upgrade my main drivers, except for the BIOS as am unsure if I have the exact correct one (Columbia II for Packard Bell iMedia 5094 Legend PC, P4 2.53, 512 RAM). I have done most of the suggestions posted, but do not know how to: - check the temperature of the CPU - downclock the ram - check bios setting about memory timing I have run memtest86 OK, run chkdsk OK. I have Macafee antivirus, Zone Alarm, and numerous other applications! If it is bad RAM, how come everything was fine before SP2? I know I could uninstall SP2, but I need it for certain applications (MS Pub 2003 being one). I would like to attach a zipped minidump but am unable to upload it (616kb - is it too large?)! I have ordered two new 512mb memory chips but am not sure if this is the problem. Could it be a device driver that SP2 doesnt like, but which one??????? Any help greatly appreciated.