You guys are fantastic!

Thank you thank you thank you

The laptop is the MSI GT72 Dominator Pro. It was the MSI True Color app that was the culprit.

Just for the record to anyone who might want to use this app. There is no setting to turn that "feature" off in the app itself. Just different screen modes to choose from .ie, Movies, office, sRGB and so on.

Only option was to uninstall the app itself, and no more annoting pop-up when moving winodows around the desktop.

Thank you so much, I spent a good couple of hours trying to figure what it was and got the answer here.

Beers on me!