Right click in eclipse is not working?

Restart Eclipse with a "-clean"

Open a command prompt (click Start, Run... enter "cmd"), then go to the directory where you have Eclipse installed with "cd ", and then run "eclipse -clean".

I had similar symptoms recently. Turned out it was caused by the Subversion server being unavailable - once that was restarted I was able to right-click. My environment was Eclipse Luna with Subclipse.

So worth checking that any connected source control systems are operational. Hope that helps.