Well, I installed a Sony DW-G120A DVD burner. I burned a couple different data discs using Nero Ex. It seems to burn just fine...the problem is when I go to see if the files are on the disc...My Windows XP shows the drive as 'My Disc (D: )' instead of a DVD-drive, and as soon as I double-click on it, it will show the files....but then lock-up or slow waaaaaay doooooooown the system. Tried different discs, same thing. It will read perfectly a 'professional' DVD video...but not the data discs, which is primarily why I got the thing. Also, when I try to access the drive it says: " D:\ is not accessible. Incorrect function." Any ideas?