Unknown window appear every so often.

Hi.
Windows 10 Pro

I've just noticed every so often a window appears and disappears before I've had any chance to see what it is.

I've not noticed anything strange in my running processes or services.

Avast, Malwarebytes, Super Anti Spyware, Windows Defender all show everything as OK.

Any way I can find out what it is ?

Thansk

TomT said:

Hi.
Windows 10 Pro

I've just noticed every so often a window appears and disappears before I've had any chance to see what it is.

I've not noticed anything strange in my running processes or services.

Avast, Malwarebytes, Super Anti Spyware, Windows Defender all show everything as OK.

Any way I can find out what it is ?

Thansk

I just started noticing that too, today. I ran malwarebytes and it found zero problems. I haven't been able to get a pattern as to when it appears, have you? It is so fast it doesn't even draw the window contents, so I cannot tell what it is.

I'm looking at processExplorer right now...

Here is the answer found in another post.
OfficeBackgroundTaskHandlerRegistration flashes a window every hour - Microsoft Community

Thanks that seems to have solved it.