Strange softbricks, what to do?

hi guys, my friend gives me a note 1 to repair. He said that a day, after updating the apps, they stop working : if he tried to open them, android was reporting that the app doesn't exist. That problem went further and started to be also with play store and gallery. After some days he got bootloop on samsung logo.
He doesn't remember but seems to be on last ICS STOCK ( never modded)
What I should do?