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Not all apps restarted when i open but some of them does and not just apps that triggered my tab to restart even when i want to open my app manangement it hangs and restart . How can i over come this? i would really like to delete some cache on my apps so my tab wont get easily hang

Sounds like you have a virus , to be sure get an app called malware bytes . The free version should do it . Then to clean things get a program app called c-cleaner. Be careful not to get on the fake sights for these apps . Try that I think that should do it