Photoshop crashes on start up

I tried to launch Photoshop earlier today, but as soon as the startup screen reaches 'measuring memory' it crashes. I don't get any error code, it simply disappears. 

I've tried updating Photoshop, resetting preferences, launching without plugins, downgrading to a different version, updating my Nvidia drivers, none of that works. I managed to launch through Windows 8 compatibility mode but it was really slow and I'm worried it could mess things up more relying on that mode.

I tried to install Photoshop Beta, crashed at the same 'measuring memory' point. Uninstalled it and any other Beta programs, didn't work.

Used the Creative Cloud Cleanup Tool to completely get rid of Photoshop, didn't work. 

Went through multiple different versions of Photoshop, all of them crashed at the same point. Sometimes it gets further into the launch but then I receive an error pretty much saying  'Something has gone wrong, Windows will report it to Microsoft' (I can't remember specifically what it said, I haven't had it come up in a while with trying to launch again and again. Either way, there was no error code with it)

I really hope someone can help, I have a deadline coming up and I really need access to Photoshop!