So I've been having a strange problem with my disc drive I can't seem to fix. And if I'm good with fixing computers and I can't fix this, it's probably pretty bad. Anyways, back in late December was when I first noticed the problem. I tried installing Windows 7 using a friend's disc, but the computer wouldn't recognize the disc. It'd recognize a CD, but not a burned retail DVD. Fast forward a month, and I was wanting to burn some discs. I pop a blank DVD in the drive... and imgburn reads the disc properly. I burn an ISO to my disc, and when it cycled the drive to verify, the verify failed because it couldn't read the disc. I then uninstalled the drivers for it and rebooted, to see if Windows would download and install new drivers for it. It did, but it's still having the same problem. All in all, it can read CDs and blank DVDs, but it won't read a burned DVD disc, either of my own or retail. What could be causing the problem? My first thoughts is that the DVD drive is getting old and needs replacing, but I want to make 100% certainty that it's the cause before getting a new drive.