So I'm trying to open up the game and see that patch 5.1.0a is going to download, but then an error pops up saying "The file "C:\Program Files\World of Warcraft\Updates\wow-0-16357-Win-final.MPQ" appears to be corrupt. You may need to download this file again".
The game was working fine yesterday but now all of a sudden this file is corrupt. I've tried restarting my computer but to no avail. Can someone tell me how to download that file again? Because I have no idea how to do that. Or tell me another way to fix the problem.