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I recently upgraded to 2.5.2.0. Since then, both times I have tried to burn a cd the drive has "locked up" as soon as the write operation is finished. It disappears from Explorer, and refuses to open when the button is pushed. I thought maybe uninstalling and reinstalling the device in hardware manager might help, but the drive is completely unresponsive. The only way to revive it is to reboot the computer. What could cause this? Thanks