[andrewas]

Probably your CD-ROM lens is dirty, so with older CDs with scratches it fails but it can still read a brand new disc. Anyway, a CD-ROM cleaner costs about £5. You should be able to find them anywhere that sells CDs in any form, a cleaner for a PSX or something will work fine. Dont use it on a CDR or CDRW though, the lenses in those are more delicate and can be damaged.