Hi,
If we run ?devenv.exe /safemode?, do we still have the problem? This can eliminate the possibility that third party Add-ins are causing problems.
Besides, we can "devenv /resetskippkgs" or "devenv /setup" in Visual Studio Command Prompt to merge the resource metadata that describes menus, toolbars, and command groups from all VSPackages available.
We also can try to run "devenv.exe /log <full path to log file>" to generate log file to troubleshoot this issue.
I look forward to receiving your test results.
Thomas Sun
Microsoft Online Community Support
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