I reinstalled cc2018. And now both 18 and 19 work better but still very strange. Now, if I draw one line it goes skew. If I draw several lines and keep the shift all the time, the first one goes skew and al the next ones go straight. Because there are also problems with photoshop and scaling shapes I think it is a problem in windows or so. I checked, I have the newest Wacom driver. My antivirus is ESET. I don't know what apps affects the OS. Threw away some apps like games and restarted. But it does not help.
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