No software can cause your DVD drive to stop working completely, though many can change your driver settings, like turning DMA off and uninstalling your ASPI drivers, you just have to keep track of what you install. As for DVD Rippers, try the following: #1 DVD Ripper Xilisoft DVD Ripper ImTOO DVD Ripper Cucusoft DVD Ripper Suite TMPGEnc Super
having 2 rippers loading and running can conflict or has been known to, reading peoples threads here... but did read once 2 rippers got a hard dvd ripped for 1 person, but this is the exception to the rule.