For some reason, Samsung hasn't released an update for the S4 in almost 2 years. Strange considering the phone is still in circulation. Like Toyota not servicing the 2014 model anymore because the 2017 models are released.
Most apps are set to automatically update.
The ones that aren't are the ones nobody uses "Google Newspaper, ChatOn, etc" so I have them set to manual update, because I won't auto-update them.
1) Ran an AVG Virus scan: Nothing
2) Got 4-5 gigs of space left on my internal and SD card too.
All the apps I downloaded are from the Playstore itself.
My FB Messenger app just updated, and all the apps I had set to never update, I click update, so now every app on my phone is updated...or "updated". Who knows at this point...