Critical error start menu is an error that usually occurs when some of your system files and settings have become corrupted. This is usually be because you installed or uninstalled some software leaving behind corrupt files or settings.
Some of the solutions to this error include:
Please see our in-depth walk-through solutions below.
To access Safe mode see instructions or visit the YouTube video tutorial links below. For Windows 10 check it here For Windows 7 check it here NOTE: If the solution fixed the error, please update your Windows 10. Windows 10 might have a patch to resolve this problem.
Windows 10 start menu critical error could be caused by a bug in Windows 10. If any solution was made above and was able to fix it. Please automatically check for an update. Microsoft could have a Windows Update that could fix the bug.