Google Play Music & Battery Drain

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http://forum.xda-developers.com – The other day I was browsing apps in Google Play Store and I noticed that Google Play Music wasn't marked as installed. I thought maybe it was an updated version, so I installed it. It downloaded and then sat there supposedly installing for hours. Eventually I rebooted my phone and that issue went away. Play Store still lists Play Music as uninstalled, Android OS is draining my battery (which normally lasted the whole day, now it lasts 5 hours), and and my phone is hot all the time. Any ideas as to what happened or how to solve these issues? Thanks in advance for the help. (HowTos)