Internal hardware communication errors can cause the drive to display a yellow exclamation mark (Error Code 19, 31, 32, or 39).
If the drive is not appearing in your system, check the following resources: Driver for Mathita BD-MLT UJ260AF - Microsoft Q&A matshita bdmlt uj260 driver exclusive
Navigate to the following registry path: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\4d36e965-e325-11ce-bfc1-08002be10318 Internal hardware communication errors can cause the drive