I have my nexus 7 pattern-locked.

1. When at power up the lock screen appears, for a brief second an empty square outline partly appears on the top left of the screen and then disappears before I have a chance to do anything with it. Just the right edge appears. What is that?

2. Is there any way to modify the locked screen? Like adding widgets or rearranging things?

Thanks.

I use Avast mobile security app on all my android devices. It is not for virus prevention which is extremely rare in android but because AMS provides a useful firewall, theft protection, and more. These are far more useful than the antivirus part. There are other tools that can do the firewall, etc. but I find Avast convenient for me.

Hope this helps.

Sent from my Nexus 7 using Tapatalk 2

I have not yet rooted my nexus 7. Still reading and picking up my courage to do it. :-) But I recall that when I rooted my android phone it would not root till I uninstalled Avast mobile security app. It's anti theft feature is designed to prevent it. One more cause for difficulty for those who have it installed.

Hope this helps someone.

Question: once rooted, but without flashing a custom rom, can the android update itself or will i need to unroot to get updates?

Thanks

Thank you very much.
Am still picking up my courage to root the Nexus 7.....

Thanks but link is bad.
No such server as goo.im