Unknown Dialog boxes - Microsoft Community

greetings,

i keep getting windows flashing on screen, disappear before can see about. it's happening every few minutes. how can find out why dialog boxes flashing (and disappearing) on screen?

i posted in security topic because don't believe normal behavior.

thanks,

shane.

the messages flash @ regular intervals. if this:

1. make note of exact time.
2. be ready when next pop-up due.
3. press prtsc keyboard button when pop-up occurs.
4. open ms word (or mspaint.exe) , paste captured snapshot ctrl+v.
5. report says.

Windows / Windows 10 / Security & privacy / PC