Internet Explorer Won't Work - Update Operating System

daughter has an "emachine" (I know, but it's too late) with XP. Son opened a "cheats" from Google and now they can't open internet explorer at all. Just gives us the "sorry, we'll send error report." They can right click on the "explorer" icon and open by "run as" but they can't download anything, or open new pages (assuming the other pages are stored). They play a game called Ragnarok(sp??) and that may have something to do with it, not sure. Anyway, I've checked internet connections and she is enabled, I've run Winsock and that doesn't help, even loaded Foxfire browser to bypass, but it won't open either, just gives me the same message. We even updated with the XP2, still nothing