If you are getting "Package file is invalid" messages when installing or updating apps from, the Google Play Store, you're not alone. Its been happening lately and so far there is no rhyme, reason, or even a pattern. But take solace as Google is aware of the issue and responded.
[#10230007] “Package File Invalid” error when downloading or updating apps
We’ve received reports that some users are getting "Package File Invalid" while trying to download or update apps.
We’re currently investigating a permanent solution, and there are no workarounds at this time.
We’ll continue to update this page with developments, so check back soon.
Issue first reported on: August 7, 2013
Last updated on: August 9, 2013