I've had my computer for 6 months, with no problems at all. This morning, I backed up several folders of pics, mp3's, documents, and zipped files, and was able to browse the net and listen to mp3's. I noticed nothing out of the ordinary during all of this. I then turned my computer off to install a new DVD burner, and add an older HD (for the extra storage space). My mobo has only one IDE port, so I have my optical drives (previously a cd burner and DVD drive--the burner has been replaced with the new DVD burner) plugged into that. The existing 160 GB HD runs Windows XP, and is plugged into the SATA1 port on the mobo. The older HD I am adding was in an older computer of mine. I did not reformat it before removing it, so it still has Windows 2000 on it (not sure if that matters at all). It is also an IDE drive, so I bought an adaptor to plug it in to the SATA2 port on the mobo. Once these had all been installed, I turned the computer back on, and instead of the typical "beep" I hear, there was a short buzz, followed by the usual beep. When the "press del to enter setup" screen appeared, I tried that, but it would not go to the bios. I put the Windows XP startup disc in the new burner drive and restarted, but it still would not boot from the disc. I tried the startup disc in the other optical drive, but to no avail. any ideas what the problem might be, or how to fix it?