Question All my windows are closing alone, then black wallpaper....

RandomForest

Commendable
Jun 2, 2019
5
0
1,510
Hey,

Today on my laptop under W10, while using Bluestack (an Android emulator) as I do every day, all my windows suddenly closed one by one, starting with the several BlueStack windows I had open at that time, then all the chrome windows.
I had a YouTube video running, the video window closed but I still heard the sound of the video. Finally my wallpaper went black.
I restarted my PC and the exact same problem occured again after an hour ...
I immediately scanned with Malwarebyte and also did an online ESET scan, nothing ....

Bluestack, I use it every day like many colleagues and I have never had any worries before. Other than that, I don't see how I would have caught a virus, I haven't done anything special in recent days.
How can I find out more about the cause of window closings and disappearance of the wallpaper? How to solve the problem?

Help thanks