MW2 Not showing up in BattleNet launcher/cannot preload Beta

[MrTux-11857]

This worked for me! Had the same problem where I had the game and Beta both showing up, but the “Update” didn’t have permissions to continue.

1. Task Manager - Shut down all Battle.net processes
2. Relaunch Battle.net app (Run in administrator mode)
3. Update installed w/o fail