A few days after the 1.5.3 patch installed, I went to launch the game, and the launcher pops up, thinks for a few seconds, then produces an error that says:
"Failed to read a required file. Please close all other applications, temporarily deactivate your antivirus software, and try again."
Hitting the Okay button, which is the only option, closes the launcher.
The only security software I have running is Microsoft Security Essentials, and shutting that down doesn't help.
Any ideas?
Setup:
Windows 7 64-bit
Mobile i7 Q720 at 1.6GHz
8GB RAM
ATI Radeon HD5870