I am using VS2015 Community edition and recently decided to apply some updates that VS suggested, as well as add a few more addins.
Nothing I tried worked.
I even tried an uninstall with the '-uninstall -force' option, which ended up coming back with an error about 'bad blocks' (can't recall exact message).
All in all, nothing worked.
I then resorted to using the 'Total Uninstaller' tool from MS which removes all previous versions on VS.
After a reboot, I proceeded with a complete re-install of VS2015.
Important note: Running TotalUninstaller actually made the re-install work better! It became clear that, prior to running this, there were leftovers from previous VS installations that caused this installation to make incorrect assumptions!]
- Unistall VS2015 via vs_community /uninstall
- run TotalUninstaller (Setup.ForcedUninstall.exe)
- reboot (it is windows after all...)
- run VS2015 installer. It now looks like it should! It does a proper, clear installation.