Unable to find service IVsDiscoveryService

I had a problem with Visual Studio 2008. When I try to update service reference I have got following error message: "Unable to find service IVsDiscoveryService"...

To solve this do the following:
Open command prompt, go to the devenv folder (usually C:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\IDE) ande type following command:

devenv /resetskippkgs


You can save some time for finding visual studio disk and reinstalling visual studio.