Not sure , is it the disk issue or the Drive .
Try running the Disk on the different computer and check , If disk doesn't work there either then
>>>You can download the software from Internet and use your serial number to serialize it.
but if the DVD does work on other machine then it is Disk Drive issue then
>>>Check is it the CD or DVD drive , if it is just the CD drive then you are out of luck as you will be requiring the DVD drive.
>>>Check other DVD , do they work fine
>>>Check for the Driver , update them
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