Display glitch on multiple monitors

[nzoomed]

new to me, but sounds like the sort of weird shit you might get from a dodgy update though.  If it's only recent you could try a system restore on one of them...

Im going to give that a go next week, murphys law is there is never any restore points when you need them, or the system restore will fail, its really weird how they have all done this at the same time, quite co-incidental.

Here is a screenshot i was sent.
That blank white space will show the app behind it if there is something else open, and sometimes will show the desktop instead.