I saved a backup of my registry and then made a change to it.
After the change, the Windows 7 battery meter no longer reported how much battery power was left.
I also was no longer able to change between Power Profiles in the Control Panel.
I tried to restore the original registry but it didn't restore the lost power features.
Now I have to keep my laptop plugged in all day because I never know how much power I have left.
Anyone know what to do here?