It has been some time now that in Windows 11, I experience this weird issue:

Now and then, I see a window (something bigger than a command prompt) opening and closing immediately.

It has a blue color, and I am unable to see if there is text inside. For sure if there is it is just a few characters.

It always opens at the same place; the center of the left monitor (I have 2 monitors).

I have tried to:

  • disable all the Microsoft Office tasks
  • not open Opera (as I thought it could have been related...)
  • check all the registries and startup options (I don't find anything strange)

But it is still here.

As for the frequency, sometimes 2 or 3 times a day, sometimes not even once... I don't have an exact timing for it.

I am thinking to reinstall the OS as I don't know what this thing is doing.

Do you have any suggestions?

  • What does this have to do with content-security-policy?
    – Sergej
    Sep 8 at 14:36
  • 2
    Blue screen typically means the Powershell window.
    – schroeder
    Sep 8 at 15:03
  • Have you tried all these suggestions: google.com/search?q=blue+window+pops+up+then+disappears
    – schroeder
    Sep 8 at 15:06
  • the tag was a mistake while i was looking for security i am notsure it is a powershell, if i open a powershell it is not blue also..i know it used to be blue but i don't have it blue i have tried some of those suggestions but they are not really solutions..noone got his problem solved! Sep 8 at 17:18
  • I would use autoruns and see what is running in the background. Sep 8 at 17:56


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