Try tools + import and export + reset. This will restore the menu in the factory settings. This may be necessary when you just installed a new version of VS, since in this case it imports the menu of the previous version of VS, so everything looks familiar. This is not always desirable.
If this does not turn off, then the next step is to run the devenv.exe file with the / safemode command-line option to make sure that this is not an add-in that is causing problems.
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