This may come in handy if you don't really want to hard power reset a W2k8R2 VM. I haven't noticed this issue with W2k12.
After applying Windows updates to a W2k8 R2 server, system hangs at "Preparing to configure windows" "Do not turn off your computer"
Wait 10-20 minutes, no changes. Typically it won't recover.
Typically the TrustedInstaller service is in stopping state, causes this.
Requires Sysinternals psexec.exe & taskkil utilities (download from Microsoft.com). Copy to a workstation that has access to the problem server. Unzip the utils, and open a command prompt with domain admin credentials.
Run the following:
1) C:\utils>psexec \\remoteservername tasklist
2) Make note of the PID
3) C:\utils>psexec \\remoteservername taskkill /F /PID
Run this again if it does not connect.
