Before I formatted the c: drive the computer recognized the CD-Rom drive and also a: & c:. When it was rebooting it came back up telling me that it was an invalid drive and that it was booting from the CD-Rom. Then it gave me the message that it could not find the CD-Rom. I got to a command prompt and it recognizes a: but no other letter drive. I have tried a-z. I do not have a windows 98 start up disk, and I wanted to put WinXP back on it anyway. Anybody have any suggestions?