XPS8930.  Win 11, updated regularly. Complete virus scan.  No new software installed or changed by me. 

Start menu not coming up right away or at all when selected.  Search function stopped working too.   

Did some online searches and tried numerous steps on various sites to rectify. Nothing worked. Start menu comes up after a few secs, then disappears, and upon reattempt, gets slower or won't display.  Right click on start menu works normally.

Start Menu Diagnostic tool resulted in Error: "Microsoft.Windows.ShellExperienceHost" and "Microsoft.Windows.Cortana" applications need to be installed correctly."

I am out of ideas other than a reset, so I thought I would ask y'all.