What version NUMBER of Lightroom are you using?
What is the version NUMBER of your operating system?
What update are you referring to?
Lightroom version: CC 2015.4 [ 1060496 ]
Win 7 Pro
Turn off the graphics acceleration in Lightroom. Go to preferences, click on the performance tab, then uncheck the box.
Thx a lot for your support Dj_paige. Was solved by updating the operating system.
But I'll do that too