Any help anyone? I'm going to try and reinstall again today and see if that doesn't work. I was also thinking that if I could get the files as a downloadable chunk and manually install them maybe that would work, rather than having to download them automatically through the installer. From what I could tell is that the issue is with .NET 4.5 framework, prior to windows 8, that was a downloable install, now it's a part of the OS. The magic number thing, has something to do with an error in the coding of the launcher when it comes to decompressing the files I believe, so there might not be much I can do, except wallow in self pity and do something else with my free time.
Edit: Reinstalled again, still totally fucked. GG.