Hello everyone!
Roger, I think I've got the same situation:
I'm running a fresh install of Moodle 2.8 on Windows Server 2012 (IIS 8, PHP 5.6.8) and SQL Server 2012.
When I try to restore a course backup (122MB) from Moodle 2.5 I get internal server error.
When I'm using MOOSH (command line utility) restore never stops.
When I open .MBZ and remove "files” folder, restore ends successfully under a minute (without files, of course).
My server configuration looks almost like yours.
Can anyone help?
Is there a way to delete "files” folder from backup, restore it, copy course files manually to the new server and then add missing records to the db?
Best regards, lucas.