I have recently resubscribed to WOW. I have the game files installed on an external hard drive as I do not have the space available on my main hard disk.
When I install WOW, I can launch the game and play it without issue. However, after I exit the game, the next time I try to launch, Battle net gets caught in a continuous loop of Scanning Game Files. It claims to finish the scan process, but never starts a repair process - it just starts scanning again.
I have followed the advice to delete the .idx files and it has not resolved the issue. If I completely uninstall and reinstall WOW, I can play again - once - but then the problem recurs.
Any help in resolving this would be appreciated.