7D Mark II Firmware will not install

[mpm1252000]

Hello - I'm looking for some help/advice.  I've owned a number of different canon DSRL/mirrorless cameras and have updated firmware numerous times...I have a 7D mark ii that I purchased (eBay) as a back up that had firmware 1.1.2 installed and, while I didn't need it, I knew that it's a pretty quick process that I'm familiar with...Anyway, I've downloaded the most recent firmware but the firmware installer hangs on 8% installed...I've researched, tried a cf and two SD cards with the 1.1.3 FW update and all get hung on 8%.  Prior to the trying to install the camera was in working condition (battery was probably only 75% when I tried to install...)...any thoughts or remediation would be appreciated!  Thanks!

[Waddizzle]

How are updating the camera?  Memory card or USB?  Be sure to have only one card in the camera, if you’re using a memory card. 

[mpm1252000]

Thanks for replying - yes, tried one card at a time (only one card in the camera at a time). The camera recognizes the update, starts the update but gets hung…stayed at 8% multiple time for 45 mins at the longest. Thx again!