Bit of long shot but....
I've been having problems with using 2 external monitors, since upgrading from MAC Catalina to Big Sur....exploring all sorts of avenues as the cause....
My Mac pretty much grinds to a halt, especially when I'm using Zoom etc....
When looking at MAC Activity Monitor there are a few things that seem to be hammering the CPU e.e. Kernal_task and WindowServer.
When I google WindowServer CPU issues, there are articles that indicate this can be affected by MALWARE. I currently use the Free version of MALWARE BYTES which has not detected any issues.
However another scanner product (Como cleaner) reference in an article, which I have downloaded, found some malware/virus not detected by MALWARE BYTES.
These are ID are:
all of these were found in website archive files (TAR.GZ) files from a website via cPanel.
Any reason why MALWARE BYTES hasn't found them and are they really a problem...?
Would Malwarebytes find/cure any issues with WindowsServer...