OK I finally took the time to update

[Lynndel]

I updated my Nexus 7 2013 to Marshmallow 6 build MRA58K. After using a combo of TWRP and Titanium Backup both Pro versions. Anyway I am a newbie to the root process. I thought when I upgraded I would no longer get the SYSTEM Update notifications. Which I did not get until the OTA flash all.bat procedure. Now when I do the system update available thingy I get the dead Android icon. I like the way my tablet is now but I still get the notification. Help