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Installed new May 2020 update - after getting a notice that my system was not ready to install the update from Microsoft - and it worked fine for several days. Yesterday, my Outlook stopped responding when sending an email, then froze. When I tried to close the program it would not, even from the task manager. After than Windows stopped working. No programs would launch, both Microsoft and non-Microsoft programs.
Shut down and restarted my Surface Pro 3 and it started painfully slow and no programs or services would start. Tried troubleshooting several times to fix the problems and Windows 10 May 2020 just would not work. Managed to return the system to a previous build, 1909. Everything is now working fine, but I would like to know what may have caused this major issue.