StarCraft II Crash on Start-Up Fix

I'm making this post in the hope that it saves someone from the hour of pain that I've just been through with StarCraft II. I was running StarCraft 2 version 1.02 and have been playing it on and off for the last week or so (it's great by the way!). I figured I would have a quick blast before cracking on with some programming this evening, and was annoyed to find it wouldn't launch. The game would load, I would catch a glimpse of the login screen then the game would crash. I'm running Windows 7, so I tried the following things that have reportedly helped others; 1. 'Running as Administrat