computer freeze when opening client

So back when URF came back i waited through a long queue time just to have my computer completely freeze when i got into the client i was extremely frustrated at this. About 1 hour into my problem i had my computer frozen so i Instinctively pressed f12 the key that turns your internet off. When i cycled it a few times my computer unfroze. it just happened to me again and the solution still works. I hope me writing this will help someone.