Pop-up appearing when I charge laptop?

[Nat1973]

Very recently I've had a pop-up appearing on my screen for only a fraction of a second before disappearing, and it only seems to do it when I charge my laptop. I troubleshooted a couple of other things, to see if it was an open browser or something like that, but everytime I've plugged the charger in, the pop-up appears not long after. It then shows intermittently while the laptop is charging, but it comes and goes so fast that I can't work out what the box says. I believe it's just a blank white box, about only a quarter the size of my screen - but I can never read the writing on the top of it, so I don't know which program it's from. Basically, I just want to know if this has happened to other people; I don't want it to be a virus or anything like that.

Oh, and as for any changes in my laptop, the only major thing I can recall doing before all this started happening was doing a virus scan using AVG. Otherwise, everything was like normal, and the previous times I've scanned my laptop, this hasn't happened.

[CherylG · Accepted solution]

Do you have Office 365? I recently started having the box flash on screen and it is a bug in Office- soon to be fixed.

[Nat1973]

Yes, I do have it installed! Thanks for the reply, I feel better now that I know what it is. If it continues after the bug is supposedly fixed, I'll put an update on here. 🙂

[CherylG]

I tested the fix posted here and it seems to have stopped it on mine. I didn't choose to Update now after enrolling to see how long it would take for the fix to arrive automatically. Too slow-so I  opened Office today and did the check now for updates. No pop up all day! 🙂

https://www.windowscentral.com/fix-command-prompt-box-flashing-quickly-windows-10