Hello, since some days my HP Zbook 15 G2 doesn't recognize the Optical drive. That has occurred after I attempted to read a DVD. Before that episode, all worked well. The model number of it is SU208GB. This is the error message I got when I open the device manager in the general tab: " https://imgur.com/LnOneYp Here is what is displayed in the Events tab of the Device manager: https://imgur.com/QawTbjM Here is what I did to try to fix: . in a CMD windows I run the following: DISM.exe /Online /Cleanup-image /Restorehealth; . then this command: sfc /scannow and it fixed existing corrupted; as suggested here on the Microsoft website: https://support.microsoft.com/en-us...er-tool-to-repair-missing-or-corrupted-system I tried to uninstall and reinstall the SATA interface from the device manager as suggested in this post of the HP community: https://h30434.www3.hp.com/t5/Noteb...recognized-HP-Pavilion-15/m-p/6490107#M435659 . I tried to fix a possible corrupted registry as suggested in the same post; . I downgraded the BIOS the upgraded it again. My optical drive is not recognized yet; even when I boot and enter in the BIOS setup it is not detected. Another option would be to install windows or Linux in a secondary drive to check if it is detected. I wonder now how to check if it a hardware failure? A hardware failure of the optical drive or of the SATA connection of the motherboard with it? Thank you.