My D drive is not being recognized when I go to My Computer, and it will not read any disks put into the drive. I have gone into the BIOS and it shows up there as Secondary Master [Samsung CD-R/RW Drive]. This is the first problem I've ever had of it not recognizing in the 3 years I've had the computer. I'm running Windows XP on an HP Pavillion 511n. I recently had a new Graphics card (e-geforce4) installed, and have had numerous problems with various things since. First I lost connection to the internet, then I could only boot Windows under Safe Mode. Then my display settings would not allow me to see my Start Menu. Then my D drive was no longer recognized. I have taken the card back out of the computer, and everything but the D drive and the internet are back to normal. I've been reading over other posts on the forum about similar problems, but have not seen anything yet about what to do after BIOS "sees" the D drive. Any help beyond this is much appreciated!