Operating system is Win 7 pro 64 bit. CloneCD version is 5.3.40 and also running AnyDVD 126.96.36.199 beta. I don't copy CDs much anymore, but when I tried the other day using my LG Blu-ray DVD/CD burner, CloneCD hung and never started to read to file. It also hung on "filling buffers" if i tried to copy a cd on the fly. On this desktop system, I also have an Asus DRW-24B1ST. Both drives are recognized by CloneCD. The Asus works just fine and will read an image to file. The LG Blu-ray hangs every time. The LG BD drive works just fine with other programs such as Fairstars CD ripper and will read, play and write to CDRs just fine. I also have Nero2014 Burning ROM installed, but not the whole suite with InCD. The LG drive and/or cables can't be bad or it wouldn't work fine with other burning programs. It also hung with Imgburn if that helps. I uninstalled Imgburn, but it still hangs with CloneCD. I can use the Asus for m y copying purposes so not a huge deal. Was just curious why one drive would hang and be unusable with programs like CloneCD, but another drive works just fine which would seem to eliminate any drive conflicts as well. Any ideas?