Rooted and Unrooted using Kingroot but wont update.

[RamenNoodles3351]

Im using a samsung galaxy tab 2 on very old version of android.

 

[dpham00]

What are you trying to update?

 

[RamenNoodles3351]

The android software

 

[mehigh101]

The android software

Welcome to Android Central!
Tripped knox/unlocked bootloader means that you cannot use OTA anymore.
Best regards,Mikey. For any more questions,PM me. I hope you found what you were looking for.
Sent from my Samsung Galaxy S7 Edge SM-G935F.

 

[anon(632115)]

Tripping know doesn't prevent OTA. A tab 2 won't have knox either. The OP just needs to find the latest fw and flash with Odin. King root will have messed up OTA