he meant to say,
go to My Computer > Properties > Hardware > Device Manager
there locate your DVD Drive and click remove, restart your system and see the refreshed drivers will work on reading CD's or not.
if still not, then its time for replacement. are you having too many fans in your casing?
Intel Core2Quad 2.66Ghz 12MB L2-Cache
4096MB DDR Kingston Hyper-X
XFX 9600GT AlphaDog
Seagate 2 X 320GB SATA2
LG L246WH Flatron 24"