I have the same problem and I have been trying to fix it for the last 3 days. I tried reinstall I tried running in safe mode, I tried copying a working game from a friend to my computer and I tried what has been sugested this thread and still no luck. Wierd thing is my boyfriends games works fine and he has the same internet connection as I.
The launcher frezes up and i can’t even close it…
I am now desprate for a sulucion!