----
It works fine before it happens..I'm leveling/Questing and Grinding. And I off my desktop because I want to take a rest, after that..I open it again and it starts to patch starts at 78% .. And I clicked many times as Run as administrator nothing happens..

and please if you know.. post a screenshots on how to solve this problem.. thanks guys!

follow these steps
1: click it's installer
2: select repair option
3: restart computer

hope that this might help