Full user review
"Worked great - and fast"
Today, my Windows 7 suddently could not find my CD/DVD drive. After going where angels fear to tread (the registry, per Microsoft's instructions) with no success, I downloaded DVD Repair from CNET. The download and the repair took less than one minute, plus time for a reboot.
None ("Whatsoever", to make it at least 10 characters for CNET)
Fast, free, and effective. What more could one ask for? Thanks, CNET!