Windows xp home doesn't recognize CD or DVD drive

My new computer has, in two separate incidents now, (first one I lost all aplications and e-mail by using the "system restore" option), failed to recognize the CD and DVD drives. It says they are properly installed but it can't recognize them. Any help out there? Thanks in advance!
 
well how new is it and what kind is it, i sugest u call the company and ask 4 help, what are the drives names (ex d:\ or e:\)
 
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