two things......
Since you didn't say, I'm assuming that you're running XP of some form.
Right? Then 512megs of ram is only half the recommended minimum, and 1/4 of what it takes to get XP up and running like its supposed to.
XP will usually run OK on just one gig of ram, but it runs considerably better on two gigs.
Next, atapi refers to the CD/DVD drive, not the hard drive.
Disconnect your CD drive(s) and see how things work.
BSOD's come from driver errors more often than not.
Unplug the data cable from your motherboard to the CD drive at the mobo end, pull the power plug from the CD drive and see what happens.
Good Luck,
The Doctor
