Problem: unknown but related to ART KitKat and error.
If we are root solution is safe. With a root file browser we go to android / data / com.whatsapp com.whatsapp and remove the folder.
Install Whatsapp from the Play Store.
If we are not root remove junk files with Clean Master. Whatsapp and then execute Desinstalaremos Clean Master in Advanced mode.
How drastic option last and will make a backup of our applications and we will do a factory reset.
We will select the app in question and clean up the cache. Return to the Play Storey will make the update.
We will install the app from the web version of the Play Store
'll Turn off the Wi-Fi and we will update or install from 4g
Google will remove our account, we will restart and return to add.
Installation Error Unssucceful
The name indicates the problem. solutions:
-Uninstall and reinstall the app
-clear Cache Store
-Uninstall updating the Play Store
-desmontar card installation SDdurante
-clear .android_secure folder
Clear the cache
Check Google account