I have a SBS 2011. I have tried to install Exchange 2010 SP3 and it has failed, in Languages! with a LODCTR code 5. Which is access denied.
I cannot use the LODCTR command (YES PLEASE NOTE: form an elevated command) It simply fails with a 5 again.
This means I cannot install .bak files and other INI files. I am sure sorting out the permissions issue will allow me to complete the install and fix all the other problems.