Sorry if I'm not providing enough information. Just this Sunday, I decided to install a bunch of mods for Minecraft, and it worked fine until the next day, when Minecraft wouldn't open no matter what I did. Everytime I try to get on, it always crashes before I can do anything. On rare attempts, I'm able to get into the game, but on an attempt to join a multiplayer server, I get stuck on the "Joining server...." message indefinitely. 

After getting a report of the opening of the launcher, I got the message of "Process crashed with exit code -805306369" 

I have rebooted Minecraft and my PC countless times. I have deleted and reinstalled Minecraft countless times. I deleted all my mods and Forge.  I am quite frustrated and all the help threads I have found haven't worked for me, some have even made it worse.