Pulsating Windows and Menus

[Paul M]

Active windows on my desktop pulsating between active and active very two
seconds. Likewise popup menus, making it impossible to select menu
items.Any clues what I should look for?

 

[Shane Nokes]

Is there anything on your keyboard holding down the space key by chance when
this happens?

On one of my keyboards the space key is somewhat oddly placed so when I rest
my wrists I have issues with them sometimes holding it down.

 

[Paul M]

No. Problem has rendered my system useless. I can't even type properly due
to the problem

 

[Lang Murphy]

Try booting into Safe Mode... see if the issue still exists.

Lang