I've tried all I can...it's not helping. I updated BIOS and it shows 163GB in BIOS but Windows won't boot past about 60 seconds. Then the BSOD and memory dump. I've checked all jumpers and everything is fine. Running XP Home SP2. Also, I don't know if this is related or not; but i've had problems with two different dvd-roms and both are inaccessible unless i reboot with the dvd in the drive. And both my 3.5's** are showing and it tries to read but gives the error 'not accessible'. It's not the drives, 'cause i've tried about 9 of them. **-To all of you who are thinking "What the heck is he using floppies for?"- I still use 3.5's because I work for a non-profit as a full-time volunteer and the other computers here are crap (486, PII's, 350MHz's....etc.) So i frequently have to use the flopps to transfer stuff and reboot when they die (almost a weekly occurence).