B.Net Update = Exception Processing Message and File I/O Error

You nailed it! That’s that’s exactly what I have too. Tell me after you were using task manager to shut down the inordinate number of battle net’s running in the little Box near the clock on the computer, did you enter in A state Where the Error screen kept popping up in perpetuity?

Also although I think I already know the answer, did you have any power fluctuations yesterday at around 2:30 to 3:00 p.m. in the afternoon?

-Seriously doubts the power outage caused this, due to the sheer number of protective measures and A/V that were installed to ensure Edison and other entities didn’t destroy another computer, after the incompetent slugs fried one during Mists of Pandaria.-

By this I mean did you Enter a State where every time you hit cancel try again or the other one it just made the popup Box pop up again and again and again and again?

Also apologies for the typos, I’m forced to use my phone to communicate on the forums now by virtue of I’m going through my 2nd full factory reset on my computer and it probably won’t recover until 10 o’clock tonight.