*Uninstall and reinstall can fix most issue*
*Go to menu and send bug report to us if you have any issues*
Advanced Task Killer is also known as ATK. It is a tool to kill applications running.
-Ignore List
-One tap widget
-Auto kill
-Customize item height

ATK is often used to kill app and clean memory. We do suggest people use ATK manually kill apps instead of auto killing app.

1. How to use it (for new users to quick start)?

ATK is pretty simple. Open this tool and take a look at the running applications list? Uncheck some apps you don't want to kill (such as Advanced Task Killer and some system apps) Tap the button 'Kill selected apps', it will kill all applications checked.

2. How to use it (for new users to do more)?

If you don't want to kill any app, you can tap it on the running applications list. Then it's checking box will turn to gray.

3. Why there are app running that I haven't used or even opened?

Some app will ">