Okay, this is a problem I have been having for years. I suspect I have a badly put-together system, as it's manifested itself in different ways over the years. It used to be garbled display output, so we replaced the video card - that seemed to sort it. Then it was random freezing-up - we replaced the PSU. The problems always seem to go away for a while and then come back at the most inopportune times. Right now, the problem is random freezing, BSODs and random restarts. The BSODs are fairly new, even though I haven't installed any new hardware for ages - so nothing's changed. My crash dumps date back to May this year. I've tried using MemTest86 - it came up with errors, but I wasn't sure which stick it was referring to, so I tried using just one, but that didn't work. So I tried just the other one and that doesn't seem to be working either. I've switched memory slots, I've removed hardware, I'm going just a little bit crazy now. I've analysed the crash dumps, but I don't see any pattern. I'm really hoping someone can leap out with a solution. (the reason there are a few days between some of the crash dumps is that on the days in between, the computer was freezing but not throwing up any BSODs). Here's some system information: Code: [b]OS Name:[/b] Microsoft Windows XP Home Edition [B]Version:[/B] 5.1.2600 Service Pack 2 Build 2600 [B]System Manufacturer:[/B] KT266_ [B]System Model:[/B] AWRDACPI [B]Processor:[/B] x86 Family 6 Model 6 Stepping 2 AuthenticAMD ~1540 Mhz [B]BIOS Version/Date:[/B] Award Software International, Inc. 6.00 PG, 27/01/2003 [B]SMBIOS Version:[/B] 2.3 [b]Graphics:[/b] NVIDIA GeForce4 MX 440 with AGP8X [i]on[/i] 4X AGP slot [b]Memory:[/b] 2 x PC2100 DDR/CL2.5 (1 x 128MB, 1 x 512 MB) [b]Sound:[/b] SB16 Also, usually the crashes happen within the first 10 minutes of the system booting...then I'll need to restart a few times and it'll be fine for hours and hours after that. Another thing is that after a random restart occurs, or if I have to restart after a random freeze, the monitor won't come back on and I'll need to keep hitting the restart button, or switch off for a while then try again. Sometimes the BIOS boot sequence freezes just before it gets to Detecting IDE drives.... Occassionally the Windows boot screen freezes too.