Efun (distributor of what we know as the "Nextbook Premium 8SE") in fact sells two different tablets marketed under the same name. This rooting method will ONLY work with a Nextbook Premium 8SE running a Rockchip processor.
**Am very sorry if this has already been posted, searched and did not find anything.**
Soon after purchasing my Nextbook Premium 8 se I learned that many Roms, apks, etc. that I couldn't find via Google (in English, anyhow) are easily found in Italian.
Which brings me to what I found today
Run that through Google Translate if like me you don't speak a word of Italian.
All right, time to sit down and write a guide to doing this. First things first: I didn't do any of this work! People like Devmonkey, Sunnyboy167, deeno33, and FinlessBob, (over at Freaktab) and Xteam at Android World Italy are the ones who've put in the legwork and hours to make this stuff possible. I'm just gathering their work in to one place.
Before you begin: Back up all your things if you want to keep them!
Also, remove your micro sd card from the Nextbook. I darn near fried mine because I didn't.
Next: You know the drill. You're a big boy, (or girl, or whatever. I'm not here to judge) I, nor anyone else is responsible if anything bad happens to your device, to you, your happiness, or your hard earned money or your time. YOU are choosing to root your device and install Jellybean on to it and YOU assume all responsibility. Cool? Also, this will probably void your warranty. But let's face it, if you're here, you probably don't care too much about your warranty anyway. Let's get rocking.
STEP 1: Make sure you have the device drivers installed for your Nextbook on your computer. I'm using a Windows 7 64 bit desktop. I imagine that other Windows desktops pre Win 8 will be similar. If you're using Linux, I believe that drivers aren't necessary. But hey, if you've installed Ubuntu, Arch Bang, Puppy, etc, you've probably got this figured out anyway.
Turn off your Nextbook Tablet Connect the micro usb cord to it, then hold in the volume up and down keys while plugging it in to your computer.
"NOTE: On your screen you should see a bubble pop up in the lower-right corner saying "Installing drivers". Most likely it will say it can't find the drivers. This is normal. Continue following the steps to install the missing drivers.
Step 2: Open the Device manager by typing mmc devmgmt.msc into your "Run" box on XP or search box in start menu on Windows 7 and hitting enter (you can also find Device Manager in your Control Panel options in Windows 7).
Step 3: With your N8 still in an off state and plugged in via USB you should see a yellow exclamation symbol somewhere next to "Unknown Device" in the list of devices in the Device Manager. Right click on it and select "Update driver software".
Step 4: Now it will prompt you to choose how you want to search for it. Select "Browse my computer for driver software" and it will bring up a window for you to navigate manually to the driver location which is in the "drivers" sub-folder in the NEXTBOOK8ROOT folder. Select which ever system you have (32bit or 64bit) and then hit "OK". You might go thru one or two prompts before it actually installs. Just "OK" everything and you should be fine." ~Sunnyboy167
Ok, now that the device drivers are installed you'll want to download the file linked from here: zippyshareDOTcom/v/60864398/fileDOThtml
Sorry, I have less than 10 posts, so you'll need to convert the dots to, you know, dots. I get why the site does that.
Scan that thing for any nasties, and then unzip it wherever you'd like. (I used my desktop) Open it and click on the folder "Mediacom 810c" Inside you'll find a file named "Rk29update.exe." Open it. You'll see a box like this:
See attached picture
That is what it will look like if your tablet is not hooked up to your computer. So if it isn't (which it should be, since I never told you to disconnect it) reconnect it now.
Click the box that says "loader," then click "Formatta!!" Which, as you might have guessed is Italian for "Format." No going back now, kid.
Let the thing run its course, it'll take a couple of minutes. Once it's done, click the box that says "Aggiorna!!" This will install Jellybean on to your Nextbook. Be patient, as this will take a few minutes. You'll hear your computer make the "device disconnected" sound, and you'll be all set. You can unplug your Nextbook from your computer now.
First boot up of the device on Jellybean was a touch slow for me, but don't panic. Once you've gotten through set up the Rom runs incredibly smooth and fast. The first screen you'll see will be the welcome (benvenuto) screen. You can select English (or your preferred language) from the drop down menu. From this point on it should be smooth sailing. Google Now works like a charm, Project Butter seems to really make a difference on this tablet, camera works, notifications work, everything seems good. There are minor bugs here and there, but nothing Earth shattering.
One last thing: for a $99 budget "craplet" from Big Lots, you could do a lot worse than this tablet. I've found it pretty sturdy, highly customizable, and generally responsive and fun to use. I also own a Nexus 7, and while this clearly can't touch it spec wise, it's definitely a fun second device to keep around.