Recently, not sure exactly when but my Blu-Ray drive meant missing from Windows. At the same a drive letter for a software based drive went missing too. There is no hardware for this second drive. The driver
allows me to mount ISO images easily in Explorer.
I spotted in the hardware area of Control Panel that the drivers
were not loaded successfully. I tried removing the hardware from control panel. After rebooting windows tries to re-install the drivers but fails.
I also tried to update drivers but Windows tells me I have the latest driver.
The drive is : Optiarc BC5600-S (slot loaded)
The BIOS recognises the driver and I have the latest OEM bios installed.