Q: Downloaded El Capitan. Now I can't login at startup. Great.

Hi. I downloaded El Capitan yesterday and now I can't login at startup. When I enter my password, the loading icon and spinning wheel appear. It doesn't load anything AT ALL. It stays right there and it will stay like that forever unless I shut it down or restart and use Boot Camp, which is what I'm using right now.

I tried restarting, Safe Mode, and reinstalling. However, when I re-install, it hangs at 90% and I need to restart it again.

Amazing. So... are there any solutions for this?

Edit: When I login using Safe Mode, same thing happens (loading screen and spinning wheel, hangs).