A few days ago I installed a new Lite-on DVD Burner on one of my PC's. The Lite-on DVD Burner seemed to be working properly when I installed Windows 7 Home Premium 64 bit. However, I ran into an issue when I was trying to do an AV scan of a several year old Multimedia PCI Card's installation CD. The scan would slow to a crawl and then the AV scanner would lock up (stop responding). The Lite-on Burner would make an audible cycling noise when it got stuck. I decided to do the same scan on a Windows XP PC which has an ASUS Burner. The AV scan bogged down on exactly the same file where the Lite-on AV scan locked up. However, after a few minutes the scan of that file completed and the AV scan eventually completed the CD scan without issue. My conclusion is that there is probably a non visible imperfection on the CD being scanned and that the ASUS DVD Burner was better able to read the CD than the Lite-on Burner. It is easy for me to jump to a conclusion that the Lite-on Burner is defective, but I cannot say for sure. Since I feel that the Lite-on Burner my be defective, I decided to go to an extreme and order a Plextor replacement. Do you think that the Lite-on Burner is defective? What has been your experiences with DVD Burners? Thanks in Advance.