I updated my computer to Windows 8.1 yesterday, and ever since then I can't get past this error. I've tried running in compatibility mode, running as administrator, etc. but nothing works. I completely uninstalled the game, and attempted to re-install it, but when I run a patcher for the first time, I get the same error. I've read through many, many other threads on the forums, and other websites, about this issue, but nothing seems to work.