Allo there,
What are the system specs of the laptop? With any update to the O/S or game, there is a chance something is added that will hurt gaming performance on older systems so that could be one explanation. As it was the O/S update it could be something taking resources so you may need to dive into that side of things.
English
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i7-9750H, GTX 1660 ti, 16 GB RAM. There was an OS update yesterday after that only D2 is unplayable. Other games are working as before.