After installing Windows 10, I got the message, ” * Critical Error * Start Menu and Cortana aren’t working.
We’ll try to fix it the next time you sign in. ” As directed, I logged out and back in, shut off and restarted
several times, but nothing worked. Web search showed you could revert to the previous version of Windows,
but the critical error message wouldn’t let me use anything. Even installed programs compatible with Win10
like Adobe InDesign weren’t working properly.