Last week my mobile phone started to constantly download a Facebook update which was draining the battery due to the constant downloading attempts. Trying to stop the download, I somehow managed to disable the download manager – this did fix the problem but for some reason also stops the Google play store from working. Every time I opened Google Play the application would just disappear from the screen. There was no forced close error message. This was a bit of a problem as I had removed the Facebook app from my phone trying to stop the download and then was unable to reinstall it as the store would not open.
To fix this issue, Open Settings, Application Manager, scroll to All applications and then scroll down to the bottom of the screen. It is necessary to scroll all the way down as the disabled applications are at the bottom of the alphabetical list. Click on Downloads and then enable the application.
The app store will then start working and hopefully you won’t get the facebook update pushed down to your phone (I didn’t at least)