Ok, when I have my D: harddrive plugged in, my system wont boot, but when i unplug it it boots fine. there is no error message When the D: drive is plugged in it bios shows the drive as slave which is correct then windows xp starting comes up where u get the bar with the  going thorugh, after that it goes to a black screen and stays frozen there, nothing changes after that. I reboot and get the same problem. When the D: drive is unplugged my system boots, then goes to the Windows is starting up with the  boxes, then it starts right into windows and takes me to the login screen like it should. The D: hardrivedrive is slave to boot drive C:, its on primary ide with boot drive. Various things I tried: tried rehasing the bios. tried clearing cmos. checked jumpers to make sure, and changed it to another ide channel as slave After all these attempts I still had no success. I am kinda getting frustrated. The harddrive is a 80 gig maxtor which came with my hp awhile back, but has/had worked previously without problems.