Dell Inspiron Not Reading CD-ROMS

I have a Dell Inspiron Desktop (530S):

 My DVD/CD-ROM drive is labeled as HL-DT-ST DVD+-RW GSA-H3IN ATA Device and I'm having issues with the drive readong audio CDs. It will read DVDs fine, but it has issues reading CD-ROMS. They can be purchased or burned from someone elses computer and it may or may not read them. Sometimes it picks them up quickly and other times it just won't read them at all (the same exact CD or different ones). I'm running Windows Vista Home Basic SP1 and this computer was purchased early last year. I tried updating my driver, but Windows said the most up to date drivers were already istalled for the device. I'm not sure if this is a computer issue or Vista. When I try to get the system to read the audio CD, through Computer, nothing happens. Inserting the CD doesn't iniatiate auto-start, so I'll click the drive manually. It will ask me to insert a disc, even though one is already inserted, and when I close the disc tray it continues to read the disc indefinitely, almost as if it is stalled. Any help would be appreciated. Thank you for your time.