Eerste Gestalt

When using Affinity Photo I switched over to the Tone Mapping persona and it froze my Win 10 PC. I have all the latest drivers (last I checked) Task Manager wouldn't even open the only thing i could do is barely move a stuttering cursor over the completely frozen screen , I had to resort to holding the power button to turn off the computer. If there is any way of stopping this or making sure it doesn't happen or happens less frequently I would appreciate a proverbial hand.