So I finally fixed my problem. I logged into the dell support page, selected my laptop,  selected "Drivers & Downloads" selected "Manually find a specific driver for your [computer name]" under "This Device" tab, I manually downloaded and installed: 'Alienware Command Center Application', 'Dell Update/Alienware Update Universal Application' and 'Realtek High Definition Audio Driver'.   I only did this because I figured SupportAssist wasnt updating drivers anyway, so I might aswell manually download the latest drivers etc.  I'm not sure which of those was the game changer, but my guess, It wasn't the Audio driver. after a restart, SupportAssist booted up fine and works perfectly now.  hope that might help someone.
I can run 'Get drivers & downloads', 'Scan hardware',....separately and individually and all is well. If I try to 'Run all' then the procedure does not complete, and I get an error message. 'An unexpected error occurredA task is currently in progress. Wait for the previous task to finish.' [IMAGE] The latest version tries to run some of the checks in parallel. It doesn't work! According to 'About', my 'SupportAssist is up to date. Version: 3.11.4.29'. I have a Latitude 7520. I am using the latest version of Windows 11 Pro (Version 21H2, OS build 22000.778, Windows Feature Experience Pack 1000.22000.778.0).
SupportAssist does not run properly