I recently bought a combo drive but right from day one it was giving me some troubles. Sometimes it simply refused to detect the cd/dvd inside or at other times it used to detect the presence of a disk inside but didn't used to read from it. After opening the drive and rotating the disk a little everything used to work fine. I thought there was a problem with my drive so I had it replaced but later on I discovered that any drive that I attach to my PC gives me the same problem. Any help ????