How to Update System on the Nexus 7 Tablet
Every so often, a new version of the Nexus 7 tablet’s operating system becomes available. It’s an Android update because Android is the name of the operating system, not because the Nexus 7 thinks that it’s a type of robot.
When an automatic update occurs, you see an alert or a message appear, indicating that a system upgrade is available. At this point, just install the update and get it over with. Don’t dally.
If possible, connect the Nexus 7 to a power source during an update.
You can manually check for updates: In the Settings app, choose About Tablet and then choose System Updates. When your system is up-to-date, the screen tells you so. Otherwise, you find directions for updating the Android operating system.
Touching the Check Now button isn’t magic. If an update is available, the tablet lets you know.
Non-Android system updates might also be issued. For example, ASUS (the tablet’s manufacturer) may send out an update to the Nexus 7’s guts. This type of update is often called a firmware update. As with Android updates, your best bet is to accept all firmware updates.