Did you ever get a solution to this problem ? My PC recently went through an update ( Windows 10 ) , before the update Cura 4.8.0 ran fine, now after the update Cura is very very slow to the point I can’t use it.. yesterday it took half an hour to load !!! But today I tried turning the wi-fi off on the laptop, and hey presto Cura runs fine, no stalling, it runs as fast as it once did !!! Very confusing