I installed Windows 7 and after my time expired I was forced to reinstall Windows Vista. After the reinstallation, my laptop (toshiba x205-9349) does not recognize that the disc drive exists. I've searched many forums and tried to delete the Upper/LowerFilters like the majority of them say to do and still no luck. My bios does not recognize that the drive exists either. This is a new drive as the laser of the first one died on me. Any thoughts? Any help is kindly appreciated! Thanks you all of your time!