I am having a problem much like the posts from Thai and also on a older Dell Dimension 8300. My story starts with a bad Radeon ATI 9800 128MB graphics card which seems to be a commom problem with this model. I found a new one on eBay and ordered and installed it. When it came up, everything was great with the video but I noticed that the OS had it as a 9800 Pro even though the circuitry was exactly like the plain 9800 128MB DDR ATI board except the fan blades were bigger. I went to install updated drivers for Video and Audio for housekeeping sake and received the blue screen of death. Went back and restored from a previous point and everything seemed good again. Started to play some music and NO SOUND!!! Popped out the sound card and reseated to no avail, checked the driver and it was the old one that always worked before, device manager check looks ok, rebooted in safe mode and turned integrated devices (sound) to on and then off again so to force an update in BIOS. No help. Reinstalled Creative from original disk and no help. I basically have checked everything in this post and nothing has worked yet. Anybody out there got a lifeline?