During an upgrade of Exchange 2010 to Service Pack 3 on Windows 2008 R2 in perparation for an upcoming migration to Exchange 2013, the installation failed at the Language Files section and the following was logged in the setup log:
[04/03/2013 00:06:40.0161]  [ERROR] Unexpected Error
[04/03/2013 00:06:40.0161]  [ERROR] Performance counter names and help text failed to unload. Lodctr exited with error code ‘1010’.
[04/03/2013 00:06:40.0223]  Ending processing install-Languages
From an elevated command prompt, run the following:
Re-run the Service Pack and it should complete this time.