WSUS 3.0 SP2 Fails at Configuring Database

When installing WSUS 3.0 SP2, if the install fails at the "Configuring Database" phase and then kicks you out check the log files.

It might be caused by the windows performance counters.

If you get the following errors in the log files:

System.FormatException: Input string was not in a correct format.
or
Error 0Ã80070643

Then run this command from C:\WINDOWS\system32

lodctr /R

Reference