[Nvidia Tegra Note 7] justjayhere:
Update5/19/2015 : Kingroot Apk worked on my 4400US model with latest Android 4.4.2

Direct download link:

http://mmgr.myapp.com/myapp/Kingroo...oot-4.0.0.233-release-201505071219_105001.apk

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The steps below work on Windows 7 (Not sure if will work on Windows 8.. If so let's us know) Make sure you have Administrator Rights to install software and run executable programs etc.

The HP Slate 7 Extreme has a few different models; mine is the 4400us and I am rooted with the steps in this guide, if you have the 4400us this guide should work for you. If you have a different model it may or may not work (one person couldn't Root their 4407ra). If you could let us know either way that might help others.

It is always a good idea to remove any android software from your PC before using that PC to minimize software conflicts {with the exception of Android Debugging Bridge ( ADB )... It might aid in windows finding device drivers (see link below in steps if needed)}

Make sure you have done BOTH system Updates on you Tablet! From 4.2 to 4.3..... Then from 4.3 to 4.4.2!

(System updates can be found in Settings/About Tablet)

Make sure USB Debugging is enabled on your HP Slate 7 Extreme... (This is very important)

(to do so you will need to Enable THE HIDDEN "Developer options”...

Go to Settings/About Tablet then start tapping on the " Build number" line! (No I'm not kidding)

After a few taps you will see on screen messages counting down how many more taps needed to be a Developer... Just keep tapping till done.

Then go back to Settings Menu... Scroll down to bottom and you will see "{} Developer options” open it and enable "USB debugging" by checking the box.)

Turn on install from "Unknown Sources"

(Found in: Setting/Security)

Also.. disable any lock screen that requires pin, password, Face Unlock, or pattern

I turned my screen timeout to 30 min so it doesn't sleep etc

NOW LETS ROOT .....

Download Moborobo http://www.moborobo.com/

Download Shuame's ROOT Genius http://www.shuame.com/en/root/

Install Moborobo & Run Program

Plug Tablet into PC with it's factory USB cable

Your Windows PC should start looking for and downloading drivers (look down in Windows notification area by clock..click on the icon that is searching for drivers so you can see when finished

...don't worry if one of them says failed)..

just let Moborobo find and install needed drivers etc

note: you will see something you need to authorize on Tablet screen.. so do so!!!!

Now look in notification pull down panel and you should see that Moborobo installed an app on your Tablet... Click to open once then just hit the home button once on Tablet.

[Might help to watch fist 1 minute & 37 seconds of this video only!!! https://www.youtube.com/watch?v=n5SsjnmV7J4 It a Guide for rooting a different Tablet... But it will show you how to use Moborobo.

...(DO NOT use the older Shuame root tool shown in the rest of YouTube Video!!!!!!!!!)]

[...if still not working (and you have authorized the security popup on Tablet screen mentioned above).. head over to: http://xdaforums.com/showthread.php?t=2317790 and install the minimal adb client on Windows 7 and try process again]

Once your ready to move on.. ( Meaning: Moborobo sees your Tablet..) NOW run ROOT Genius (just Minimize Moborobo)

Root Genius will do it's thing (your Tablet Will Reboot during Process)

Profit (you are Rooted)

Use "ROOT Checker Basic" free in Play Store to ensure you are Rooted!

Note: Root Genius installs a super user app called "Kinguser" during the root process.. (which is also an app backup tool and has tool to disable apps from automaticly starting).

Per Jupiter683:

"If anyone has the Beats Audio Edition and they want to root, Towelroot works like a charm!"

Hit Thanks if I helped!