I am at my wits end regarding this problem; every single program on my computer, in a sort of strange domino effect, tends to lock up despite there being ample resources to keep them going. Usually this results in my most-used apps (eg: Firefox, Media Player, Live Messenger, Task Manager, and even Explorer) freezing, without any way to restart them (Ctrl+Alt+Del takes a hideously long time to show up no matter what OS I use) but now it's resulting in horribly long boot times (as in, upwards of 5 minutes) and sometimes failure to boot at all. This may seem like a software issue, but the thing is that I have a multi-boot configuration on my system, and this occurs on every single OS I try (and even on XP64, I got a message telling me part of my registry had been corrupted). I at first thought it was a virus, but I can't for the life of me think of a virus that could strike all of my OSes at once, so I'm assuming it's a hardware issue. I've tried testing my RAM using memtest86 off the Ubuntu CD, and it came up with no errors that I could see, and while the temperature is higher than normal (around 50-60 celsius) this happens even when the temperatures are only around 20-30 or so. I'm at my wit's end. So, please, kind people of Computing.net, I beg of you; does anyone know how this problem could be fixed? Specs; AMD Athlon 64 X2 5000+ 4gb DDR800 RAM ECS 9800GT 1gb 450W PSU 1x IDE 250gb HDD (boot drive) 1x SATA 500gb HDD (data drive) 1x SATA DVD-RAM drive XP32/XP64/Vista64/Win7x32 WinFast DTV1000S TV tuner Gigabyte M61PME-S2