I posted the other day about a problem with my mac failing to boot which is resolved, I also had a message scrolling across my screen informing me that the screen savers would not run and I should contact the software company to resolve the matter, and now my software is running very slow all this has happened since apple have interfered with the setup. Any advice as to what has happened and how to resolve it. Running on Big Sur hard drive free space is at 75%, processor 3ghz quad-core i5 8gb 2400mhz ddr4, Anyone any ideas on how to solve this problem.