i tried this guide:
1. Delete your gamefolder
2. make a new gamefolder
3. Donwload the gameclient from utorrent, see the website under FILES
4.When its downloaded RIGHT click on the file, before extrating it, and uncheck the "safety features" added to the file.
5. Extract the file into the new gamefolder.
6.Run the updater as administrator
7.Problem should be fixed
Plz check if this works for you too, if it doesnt then you need to this:
1. Open Commando promt as ADMINISTRATOR.
2. type: net user administrator /active:yes
3. click En