Worked with HP support for several days to try to get Blu-Ray to be recognized properly. Restored HP computer back to original condition 3 times - the drive was recognized, but then caused Windows to freeze up. Microsoft said this drive was compatible with Windows 7-64 bit, but LG manufacturer's website didn't list Windows 7 as being compatible.
The moral of the story - there are not many Blu-Ray burners out there that are compatible with Windows 7. LG makes most of them and only a few are listed as Windows 7 compatible. Make sure you check the manufacturer's website for compatibility and not just Microsoft and do not rely on your sales person to choose the proper product for you.
Had to return the original Blu-Ray to the supplier and I just purchased another LG Blu-Ray that says it is compatible - will let you know. Thanks!