Hi Chris, it may be best to do a re-flash of the same firmware then do a hard reset. You may get the firmware from this link, http://support.linksys.com/en-us/support/routers/E1200. Do a hard reset right after the firmware update.
To do the proper reset:
1. Press and hold the reset button for 30 seconds while the device is on. The reset button is the one underneath the device.
2. Release the button and unplug or power off the device.
Once done, reinstall the settings.