Unable to Install Titanfall after downloading - Error messages 0xC0000005 and 327682:0

Hi,

I have been battling with every troubleshooting action I can think of, and a bunch I never would have but tried anyway, to get Titanfall to install after downloading it on Origin.

Nothing has worked. Whenever I try, it gets a load bar without any progress and just sits there, Then, after 15 secs - 2 minutes, I get a pop-up error message under the heading EAProxyInstaller.exe which says it was unable to "start correctly" and gives me the error code given in the subject line: 0xC0000005. After I click OK on that, two messages pop-up from Origin. One in the bottom right says "Titanfall: Download failed" and the other pops up in the middle of the screen telling me to try again in a few moments (I've done this more than a dozen times now, so that advice obviously isn't valid). That pop-up also gives the error code 327682:0. 

I have tried re-downloading it, I have tried re-installing Origin, I have unblocked Origin and done all of those basic steps, I've tried using the repair tool, and a bunch of other random things with no success. Is anyone else having the same issue, or is it just some bizarre eccentricity of my computer making it not work?

Any input would be appreciated. I am at a dead end, and am about ready to ask for a refund.