DvD went poof

hello,

well i have vista and a aspire 5100-5023, and i was playing GTA
san andreas and after i quit i tried to replay it but guess what? the
dvd drive is gone. its not on the my computer thing and when i try to
play any game the standard please insert (name of game) disk 1 pops up.
no matter what game i try playing this happens. so i was wondering if
this happened to anyone else and if anyone know a solution for it.

thank you


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dilan155