There was this problem that windows showed up half of the time when you played matches. Now i have the same problem. I cant play friendlies, play cups matches, open my friends list, cant click on online users and other stuff. I have tried everything there is to do Switch from Open GL to Direct X and vice versa. I deleted the Power Challenge game plugin and deleted all of the files related to ps. What can i do to play again?
Also provide more info or a screenshot of these 'windows' that show up. Dain or someone else more techy than me, will need more info before they can help you.