I have an ASUS K501 running Win7 and an HL- DT-ST-DVDRAM GT10N SCSI CDROM. This is the second of the same drive I have installed on this machine. Currently, it fails to recognize store bought DVDs from the US. I am deployed to Afghanistan, and it plays the locally available DVD Rip disks just fine. The last drive did the same thing after I was deployed to Iraq and played the movies bought there. Eventually, it failed to recognize almost every disk inserted and I was forced to replace it. This new drive was just installed six months back and was playing US DVDs for the first few months, but I had not tried them for the past few months. I recently attempted to play some local movies, but the quality of the recording was so poor, that I was forced to copy them to my hard drive for them to play properly. Since then, my drive fails to recognize conventional DVDs but will still recognize a blank DVD-R or a locally made DVD Rip on DVD-R. Has running these local DVDs done something to damage my system? Since this is the second occurance of exactly the same issue, I'm wondering if it is that or just crappy hardware. When I removed the drive, I noticed it had a non-typical connection, and was forced to replace with exactly the same model drive, as I could not find another brand with that same type of connection. Any insight would be appreciated. Thanks