windows 10: video playback no longer working - black screen

I just opened up Cubase to start a new project and can no longer see video. The screen is black and just shows timecode. I verified that old projects no longer show video either. Can anyone replicate this?

Cubase 10.5.20 Build 179
Windows 10 Pro Version: 10.0.19041 Build 19041

full screen video or just the window?
which graphic card?

the graphic hardware is handling the video display at the end…

Full screen or windowed - does not make a difference. The graphics card is an Nvidia Titan V. The other display is run by an RTX 2080 TI. Both displays/cards just show a black video. That said Cubase was able to show video on both displays with the same graphics cards - no changes there.

so what changed?
drivers? Windows Update?

I suspect it’s a Windows update. Microsoft pushed out two updates since I last worked in Cubase.

Initializing the Cubase preferences solved the problem:
https://helpcenter.steinberg.de/hc/en-us/articles/206618850-Troubleshooting-for-Cubase-Nuendo-and-Sequel-on-Windows