I too am getting this, did you figure out how to update? Is it to uninstall Magisck, take the update then re-root? Not sure what the update is, I have P7 Pro unlocked version I got from Google, using the non VZW version. It is a 7.24 MB update. annoying getting the "Couldn't install system update" message in the notification areaI have the "Auto System Updates" toggle off in developer settings but my phone keeps trying and failing to update each morning (approx) anyway. I used to freeze "system update" in titanium backup but I don't see that in this build. Is there a way to kill updates completely? I always select "do not auto update apps" so I can control which ones get updated but this morning apparently this setting got turned back on and apps I do not want updated were all done and I think it is this system update attempt that is responsible.