I don't really expect anyone to have an answer for me, but just wanted to let off some steam. Decided in my wisdom to upgrade my aging 1ghz P3 machine to one of these new fangled AMD64bit machines. So got an Asus A8V Motherboard, AMD 3Ghz cpu (yap I'm a cheapskate!) 1Gb Ram. Stuff it all together, first it wouldn't boot, after a bit of googling, found that they shiped my m/board with an old Bios which wouldn't boot my cpu/ram, so after a bit of fiddling, got a new bios on there and it works. Installed XP SP2 on it, got blue screen left right and center with stop 0x00000050 errors. Couldn't install anything, did several fresh installs, still the same. Installed XP with No service packs, shaky but no blue screens, insall SP1, and the blue screen was back with stop 0x0000004E this time. Done a windows update, which seems to have made it a little more stable. Still can't get ZoneAlarm to install, saying it has no digital certificates, it used to install fine before I upgraded. Reading around it apears to be that Windows is shipped with a dody usb device driver that can cause these problems. Upshot of this is, my computer has been unusable for a week, and poeple wonder why I don't bother to upgrade, its for too much hassle! What with dodgy hardware suppliers and dodgy software its a battle just to get the thing to work. I've had enough of XP problems. I will be moved to Linux very soon. Arr, thanks that's better, needed to off load this somewhere!