Setup cannot continue with the upgrade because the “beremote()” process has open files.

I was applying a Service Pack to an Exchange server last week and came across this error message when running the setup wizard:

Setup cannot continue with the upgrade because the “beremote()” process has open files:

The server was being backed up with Symantec Backup Exec, this was causing an issue. I stopped the Backup Exec services and was able to continue with the service pack installation.