New
#11
Generally for stand alone codecs I reccomend Shark007's codecs. I myself use Media Player Classic and the Klite codec pack. I don't want to cause you any conflicts however. If your Media Player Codec Pack shows up in Programs and features, you could uninstall it and try Shark007's codecs (he is also a member here).
Shark007.net - Windows 7 Codecs - WMP12 Codecs
It is still odd about battery/ac difference. It would seem it must somehow be power plan connected?
A Guy