Hello, I'm a new member and would like to introduce myself to everyone. I'm a retired PC tech. Recently I tried to install an HP USB burner on my T-23. After the software loaded I lost the DVD drive in "my computer". The DVD drive shows up in device manager with an exclamation mark. I've tried just about everything I could think of to get the drive to show up in my computer. I've tried reinstalling drivers, uninstalling and removing it physically and then rebooting. The PC doctor on board says the drive is good. This drive is a Matshita 8174 drive by Panasonic. Any info would be greatly appreciated.