CDFS is refering to the filesystem on the CD-ROM; I'll second the motion for checking the disk for damage.
If you verify that the CD isn't damaged, then you might have a hardware problem, which could account for the BSODs you were getting before you decided to reinstall. Do you remember any of the BSOD error messages? If you have any more detailed information you can give us, that might help us narrow things down.
DMR
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