how to hard reset Acer Iconia Tab A100

Resetting your Acer A100 tablet

You may have to perform a reset if your tablet fails to respond when buttons are pressed or the screen is tapped.
To reset your tablet use a small thin object (such as a paperclip) to press the recessed reset button.

Insert a small thin object (such as a paperclip) to reset power to the tablet.

ACER Iconia Tab A100 Clean boot

A clean boot will restore your tablet to the factory settings.
Warning! This will erase all your personal information, any contacts stored on your
tablet and any programs you installed.
Open Settings from the application menu, then tap Privacy > Factory data reset; click Reset tablet and then Erase everything to format your tablet.
After a certain number of wrong entries, you will be presented with an
option to reset your pattern. Tap Forgot pattern? and enter your google account username and password.
Note: You must have an active Google account on the tablet. If not working do a clean boot.
Updating your Iconia A100 tablet’s operating system
Your tablet can download and install system updates, adding support for new devices or expanding software options.
To check for updates, tap Apps > Settings > About tablet > System update > Check now.
Note: Downloading new firmware can take up to 40 minutes, depending on
your network speed.