@MAX12
Thank you for posting on HP Forums,
Riddle_Decipher is at your service.
As I understand you need information on upgrading the Android version from 4.2 to 5.1.
Don't worry as I'll be glad to help, however, to provide an accurate resolution, I need a few more details:
Did you check the FAQs for your device?
If not, here's what you need to know and I'm afraid though I don't like it, I'll have to be the bearer of this news:
The computer comes with Android 4.2 Jelly Bean operating system installed. Upgrading to another operating system or Android version is not supported.
For more details: Click here
Keep me posted,
If the information I've provided was helpful,
give us some reinforcement by clicking the solution and kudos buttons,
that'll help us and others see that we've got the answers!
Good Luck.
Riddle_Decipher
I am an HP Employee
Learning is a journey, not a destination.
Let's keep asking questions and growing together.