windows 98 booting problem

I have a computer that was given to me so I do not know the history of it. The problem is when In it on the computer boots and briefly flashes the Windows 98 screen and the immediately goes to the c: prompt. I have looked it the windows directory and all the files for Windows appear to be there. I have also did the F8 thing and it looks right. I have also tried to use a recovery disk and I know that the CD ROM is working but it will not pick up the disk its like it does not recognize the drive.Any ideas of what could be wrong? Or any websites that could helpful. I am trying to get this computer running for my daughter.