here is you answer straight from the apex wiki  I get a message saying system not responding, force close or wait. What should I do? In very rare instances, this error can occur. It usually happens after installing a theme that changes the services.jar, or from a random reboot. This happens because of my startup script, which may try to make changes to the system too early in the boot process, and cause it to be unresponsive. It is by default set to wait 42 seconds before attempting to make a change, and for the most part, this seems like it is sufficient. Quick answer: Just hold down the power button until the menu comes up, hit reboot, and it should sort itself out.