So I hope I haven't don't things that cause this to be a permanent problem, but here is what has happened so far: I updated to El Capitan about a week ago or so. Everything was going ok, though I didn't notice any great upgrades and it seemed to be a bit slower...but whatever. Yesterday my Mail app kept crashing when I tried to open it. I thought maybe the new OSX had a problem so I checked for an update and poof, there was one. I decided to try that before doing anything else. I downloaded it and it restarted the computer as updates do. It then got to what I would guess is about 60% or so, and stopped. I did that at 6:00pm last night and left it until 8:00am this morning. No change. So I then started researching. I did a hard shut off and startup. It took me to the login screen and I put in my password and it went to the loading screen, got to 60% and stopped...or an hour. I then tried going to the recovery and repairing the drive but no problems there. So I tried booting in safe mode. I don't think it actually did, I would press shift but it wouldn't actually seem to be any different then normal startup. Regardless, this didn't seem to help. I tried resetting the NVRAM I think it is...Option + Command + P + R. This definitely did something, after it restarted this time I get to the login screen and put in my password and it stop with 0% loaded... So now what? I can reinstall the OSX and I can go to a previous backup...but I am an idiot a haven't run Time Machine in like 6 months so I would lose a lot of important work documents. Is there any hope? What can I do?