www.makemkv.com

While downloading dvd's as usual, then all of a sudden, it no longer sees any dvd in the tray?Blue light flashes on both the dvd and the program image & shows it spinning. Then it quits and says no disc. What gives?
Yes, I'm a newby... I did shut it down, restart the Mkv, restarted the HTPC, made sure I'm running as admin... now what?
MKV1.9.8 x64 running windows 10
Information
OS device name: D:
Manufacturer: ASUS
Product: BW-12B1ST a
Revision: 1.00
Serial number: K95E3JD1414
Firmware date: 2113-04-23 11:47:
Bus encryption flags: 1F
Highest AACS version: 56

No disc inserted

With MakeMKV NOT running, can you access the DVD or BD with Windows Explorer, and get a directory?

If not, Windows itself is not seeing the drive properly. Try shutting the machine down (as in power off), then restarting it. There are times when a drive will get into a state where it won't talk to the operating system, and only powering the drive (or motherboard) down will reset the interface.

I had done several restarts & it was then that II noticed it wouldnt even see a disc in windows. ??? I ended up un plugging the BD from the HTPC motherboard & doing a restart too let it Not find it , then replugging it in to let it "find" it again.
And its back to working...Weird.