I am trying to install the Exchange 2010 SP1 upgrade on a Windows 2008 R2 OS.
The upgrade clears all the pre-requisites and starts the update process but when it gets to the 'Languages' step of the upgrade the system immediately errors and the upgrade fails.
the Error is: The process cannont access the file 'C:\Program Files\Microsoft\Exchnage Server\V14\Logging\lodctr_backups\InstalledPerfCategories.log' because it is being used by another process.
Restarting the server makes no difference.
Deleting this log file has no effect.
Making sure 'everyone' has write access to an exitsing version of the log file has no effect.
I am trying to install the complete language bundle (which has been downloaded and is successfully verified).
I can restart the upgrade but it always fails in the same place.