After installing update on windows 2008 R2 Server, restart was necessary but after long time ( approx 1 Hour wait) server has not restarted. Ping was working fine, but RDP was not working. On the server console below text was getting displayed:
Preparing to configure Windows. Do not turn off your computer.
Kill remotely process
trustedinstaller.exe, for example use
taskkill /s Server /IM trustedinstaller.exe /F