You didn't install. Open terminal and issue the commands that are here on the forum, namely (as root) apt-get install --reinstall kernel-power kernel-power-flasher Make sure you type it correctly. Also, make sure you reboot. If it fails, paste the output of the above command here.
Package kernel-power is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package kernel-power has no installation candidate