Recently my Visual Studio 2013 stopped responding to keyboard input. I couldn\'t type anything in any of the files. I suspended ReSharper and It worked again but I would really
Clean the following folder with ReSharper caches C:\Users\{User Name}\AppData\Local\JetBrains\ReSharper\v8.2\SolutionCaches\
[Update]
For R# 9.x/10.x: %LocalAppData%\JetBrains\Transient\ReSharperPlatformVs{VS version}\v0{some digit depends on R# version}
You might want to try (- within SSMS), clicking upon the Tools
menu, clicking the Customize
option, clicking the Keyboard
button, and then clicking the Reset
button, in order to reset/fix the key-bindings.
It worked for me, for both v16.5.3 and v17.5. I have RSharper installed / no R#er changes necessary.