yashsingh1/xdaforums huggingface dataset:
[Device Reviews and Information] LuxZg:
#1 - make backup, best if you make an image of whole Chuwi, see few pages earlier for short tutorial I wrote combining info from this and few other places, look for Macrium Reflect

#2 - upgrade current Win8 installation to Win10, that will activate your Win10 license because it recognizes Win8 key and will use it for activation of W10. It's important to make in-place upgrade first. And make sure W10 is activated once you finally boot and login into it.

#3 - download W10 drivers that few people posted here and ther, or export your own by simple magic of PowerShell. I'm on phone so don't have command at hand, but search for Powershell+export drivers+windows 8.. Logically works for 10 as well but all tutorials only mention W8/W8.1

#4 - if you don't have Android rest is simple. Download Microsoft Media Creation Tool, create bootable USB, boot from it, delete partitions that you dont want / need & format everything, install W10 and if some driver is missing you'll have it in export from step #3. Also once Chuwi connects online it will automatically recognize that this hardware already had activated W10 earlier (step #2) and will activate this copy as well. If anything goes wrong with either step (upgrade, installation, activation, reactivation, drivers, partitions, etc) you still have backup image from step #1 to go back to exact image that you had before playing with this all.

Happy hunting!!

Oh and if you ever succeed storage upgrade post a video, I'd like to see that :D though I expect zero chance for that :)
[Device Reviews and Information] yhanto:
Thank you so much for the guide. i'll make sure i do this carefully and make preparations necessary. But you haven't answer my original question. After you succesfully did everything and install only windows 8.1 on it, can you still access the bios? I deal with people's complaints about their computer everyday and i always install windows and softwares (XP/linux/7/8/10 etc) using usb drive. So i know how important is the bios to set up the first boot device. I'm asking this just in case i want to revert back to the original image by restoring the backup image with acronis. And without the bios, i think i wouldn't be able to make it boot from my acronis usb drive to do the restore or even do a clean windows re-install someday. Or can i?
[Device Reviews and Information] Michel177:
new Chuwi Vi8+ dual OS blab no hdmi

I just received my vi8+ a couple of days ago . I upgraded my Windows 8.1 to 10 with a USB dongle .I got the activated key .Then I wanted to removed the recovery by installing the appropriate Windows 10 home edition from a Microsoft made USB key .Everything went well except that I get GPIO X 2 error and I can not connect to the internet (no WIFI ) .My model is CWi512 .I have search eveywhere for the drivers .No luck .
[Device Reviews and Information] yhanto:
have you tried the drivers from win8.1 yet? maybe they're compatible. here's the download link. it's from te**tab**ts.com
[Device Reviews and Information] Michel177:
Vi8+

Yes I did .It seems like the WIFI adapter might not be a Realtek .I decided to find the Hi8 drivers .I found that it uses Broadcom wifi adapter .Voila .It installed and gave me access to wifi .
[Device Reviews and Information] LuxZg:
Well, I never tried deleting everything on Chuwi, and some ppl claim that there is maybe partition on EMMC related to UEFI BIOS. If you want to be sure, you'll have to do bit more reading. Tell me, is your Chuwi dual boot with Android or just Win? If it's just Win, than you can check yourself. Windows by default has max 3 partitions - small system partition of 100MB for boot loading, bit larger recovery partition of 3-8GB, and rest is all one partition. If Win-only tablet has some other partitions beside these three you can post screenshot or some report and we can try to put them appart..
[Device Reviews and Information] yhanto:
mine is the dual boot. there is no windows only version here in indonesia. or at least not that i know of. maybe i'll try to make a backup image of the whole emmc first. but first thing's first, i have to get me one of those microusb hub so i can plug the flashdrive and keyboard at the same time. well maybe soon i can find some time to browse some local store here. and about the UEFI partition, i guess it just contain the UEFI firmware which i think is not too big. and i think i would just leave it be. afterall, the hi8 bios file i found on te**tab**ts.com is only about 7-8mb. maybe it's the same size as my vi8. i don't know.
[Device Reviews and Information] tiagao_extremo:
Hi Yhanto, these days i'm using a clean install of windows 10 pro x86 which i installed from scratch. The thing about the chuwi is that there's maybe at least one hidden partition which we can't delete. It stores at least the OEM key for windows 8.1 with bing. Anyway, the uefi and recovery partitions are created again once we format the internal memory, so there's really nothing to lose. And yes, all settings from the uefi bios are still there. So far, the device performs much better using windows 10 than windows 8.1. You will need the drivers from windows 10, which you can also download here:

https://mega.nz/#!Rc00zYaL!INlC8bvEPAVVn_yyw2y3fMo70gix71Qd28Llw5VG38o

PS: After installing these drivers there will be many updates for hardware devices. Through windows update you will be able to update only the vga, but if you use this tool you will be able to download the other updates, it's free and called Windows Update MiniTool.
[Device Reviews and Information] yhanto:
[MENTION=6073759]Michel177[/MENTION], there you go. Tiagao just shared his win10 drivers.

[MENTION=421599]tiagao[/MENTION], Thanks a bunch mate. Such usefull link and info you shared there. And about the UEFI partition stuff, that's gold. As soon as i get my microusb hub i'll do it for sure.
[Device Reviews and Information] neejkisf:
why my chuwi vi8 don't have dual os ? and i can't find C:\Program Files\Insyde and create a shortcut of the EXE file
[Device Reviews and Information] krkspds:
Check here for os switch

http://xdaforums.com/showthread.php?p=63042701
[Device Reviews and Information] maxilimian:
Hi, i run out step by step rooting with the "ashan method" but have no luck, so i'm rooting with kingoroot and success, but now i want to install cwm for my chuwi hi 8, since i can't find the way, could anyone help me with the file and tutorial? kernel version 3.10.20 softteam@ppd-build#1 Wed Jun 10 11:28:57 CST 2015, does hi8 and vi8 has the same cwm type? i mean works the same with these two kind?
[Device Reviews and Information] shadwolordKT:
My android wifi stopped working; but it works fine in Windows 8.1. When I try to turn it on in Android settings, it never goes on. The switch slides to the ON position, but seems to get stuck and stays greyed out.

I attempted a reset of the tablet (via android), but it hasn't helped.

I would like to reimage the tablet from images downloaded over the net, but the MFT.exe tool always crashes in Windows. Does anyone have any tips? I can get files onto the tablet via microSD, is there someway to flash it from on the tablet?
[Device Reviews and Information] krkspds:
Does anyone have a stock or close to stock nandroid backup of build 20150520? Mine has become corrupted and I want to restore a stock build.
[Device Reviews and Information] oxygenoxy:
I've been using my chuwi vi8 in Windows 8 for quite a while. Recently, I tried to upgrade it to Win 10 but it keeps failing at 55%. I am using the download tool, and have also done a factory reset of my Windows 8 before trying to upgrade. Any other ideas on what I can try?
[Device Reviews and Information] SDA_Lord:
Looking for a way to restore my tablet without using MFT, because the MFT tool is not working for me. (I posted earlier as shadwolordKT by accident because I thought my Google account was linked)

Does anyone have a disk image of the stock Android partition that was made using any Windows tool that I could grab?
[Device Reviews and Information] 4everAnoob:
Wassup m80s? Would you recommend this tablet to complete technological noobs? For example would it be a suitable gift for an elderly person :P ? Or does it require lots of tinkering etc.
[Device Reviews and Information] karmasblade:
Has anyone experiences stuttering video in the tablet itself and not only on TV? Whenever I run a flash player video it starts and stops every 3 seconds or so even though my WiFi connection is good. Also, Wifi is kinda slow on it, not the network though. Anyone know a fix?
[Device Reviews and Information] dirtykimchi:
Got a secondhand Unit (CW1501) with the above mentioned Q32G22141207*** Serial Number & cannot find a proper Image for it . Would like to get it back to a new Out-Of-Box unit. The Unit seems to have been sold by Pengbo.hk originally.

Having issues updating to Windows 10 from within Windows 8.1 (It always fails at about 86%) & there seems to be a driver issue with the cameras in Windows 8.1 as well. [Have contacted Chuwi concerning the Windows 10 update issues, but not expecting very much from them]

Did do a clean install of Windows 10 onto the Vi8, but the touch screen was so unusable that it was restored back to Windows 8.1 with a System Image Recovery that was created prior to the Clean Install.

The camera driver issue seems to have started after the System Image Recovery.

Prior to all of these attempts, the Vi8 was reset via Advanced Startup.

Any comments/advise are welcome.

_______________

Managed to resolve this with some more troubleshooting. Had to force the I2C drivers to the one that is floating around for the dual boot version.

It all works now. Just having sleep issues in it. Sometimes it requires a full reboot after it falls asleep. Dunno if this is a common issue with the move to Windows 10 TH2.
[Device Reviews and Information] Michel177:
Chuwi Vi8+

--------------------------------------------------------------------------------------------------------------------------------

I have the Chuwi Vi8+ model CWi512 (back of unit ) .Mine has serial starting with Q32G2215XXXXXXX .I want to try Android x86 6.0 but I can not start from the USB drive .The boot menu is much more complicated than with my Teclast X80H .My tablet is dual boot and black but without the HDMI connector . I have installed (updated ) Win 8.1 to win 10 using an external USB Windows 10 home 32 bit drive but I have to manually select the screen rotation in Windows .
[Device Reviews and Information] john2k10:
doubledriver?

Hi Michel177, any chance of a doubledriver backup from your tablet please? I have the exact same model but cannot get the drivers anywhere. I can live without the accelerometer, as at the moment, I have a completely non-functioning windows side of the tablet!

Thanks in advance :):D

---------- Post added at 07:12 PM ---------- Previous post was at 06:49 PM ----------

Use rufus to create an android x86 boot usb formatted as fat32 and mbr for uefi firmware. Press escape when booting and boot from your usb stick, I've managed to get as far as the installer as a test, looked like it would work well enough.
[Device Reviews and Information] john2k10:
Use rufus to create an android x86 boot usb formatted as fat32 and mbr for uefi firmware. Press escape when booting and boot from your usb stick, I've managed to get as far as the installer as a test, looked like it would work well enough.
[Device Reviews and Information] laserchalk:
I have the same problem but the down volume was broken the day i got it.
[Device Reviews and Information] Michel177:
Hi Jonh2k10 .I upgraded my chuwi to Win 10 .Please see posts 474 and 477 .I don't have the drivers for Windows 8.1 but you can find them somewhere in this thread .
[Device Reviews and Information] WiwiPouPou:
I tried to boot (without quiet command on grub), it post but then black screen... Which image did you use ? x64 ?
[Device Reviews and Information] r00fein:
i have a problem on auto-rotate. It is set to 180 degrees, i change it to 0 and then, when i close the windows it's being set to 180 again. I m on windows 10 and i had unrensponssive touch, and i installed the "win 8.1 aprils 2015" drivers. Do you think it's caused of wrong drivers?
[Device Reviews and Information] zeldoso:
Windows 10 Battery Drain

Hi, I have a problem with my chuwi standby battery life.

In android, using DS Battery Saver to toggle Wifi and sync off during standby, the discharge rate is around 1-2% every hour. Thanks to this slow discharge rate I don't have to plug the tablet in every morning or ever shut it down completely.

On windows 10, the battery drain during connected sleep is huge (10-15% every hour), and I don't want to shut the tablet down every time I want to lock the screen. Anyone has encountered this problem? (updated windows 10 using the windows driver founded in this tread.)

This is the only reason I use android, but the fonts are blurry and there is no HD netflix.
[Device Reviews and Information] nordicclash:
Are we going to get android 5.0 update? Is there any custom roms for vi8
[Device Reviews and Information] mat9v:
I don't think so. No to the second question. You may try to download and boot from flash drive with generic x86 android, currently at 5.1 stage I think and test if it works on your tablet. If it does you can try and install it into the internal storage.
[Device Reviews and Information] karl0ss:
I just want to check, as I have just read thought 50 pages of this thread any only one comment relating to my issue...

I have 2 of these devices, my wifes and my sons, now my sons one seems to shutdown due to "thermal shutdown" all the time, but my wifes one does not, I know they playing different types of games, but for the most part, I don't see why would cause such an issue...

I ran Antutu on them side-by-side and my sons shutdown after 4 runs but my wifes didn't though they both seemed as hot...

I'm aware of the "cooling mods" but as my wifes doesn't shut down, it doesn't seem like the mod is needed...

Anyone else have this problem? as no one seems to be reporting it?

Thanks
[Device Reviews and Information] mat9v:
There may be differences between units as in the amount of thermal compound, different chip characteristics as to the heat produced (chips are tested at production stage for max safe operating temperature and binned accordingly) and even different firmware versions. Additionally what to your hand may seem as equaly hot on the surface of the tablet may mean 5-10C difference on the chip itself since they are designed to operate at close to 90C and the surface of the tablet does not heat up as much.

So yes, cooling mod

may

be required for such unit :)
[Device Reviews and Information] kostyamat:
Hi, guys.

Now you can try my port of TWRP-recovery v.2.8.7.0 for Chuwi Vi8 CW1506. http://www.needrom.com/download/chuwi-vi8-dualos-cw1506/

If You like my work, please buy me a beer. ;)
[Device Reviews and Information] jkevinj:
[Help] As I can extract and modify the BIOS

Good evening friends, greetings from Venezuela. I think this and I need your help.

I have a tablet canaima (Model TR10RS1), which I modified an option in the BIOS and I can no longer access. I put eMMC 4.5 and now does not recognize the keyboard on. I tried with the FPT Tools Package tool, but without results. I would appreciate if I could explain how to back up and restore the BIOS of my tablet. Sorry for my bad English, greetings from Venezuela.

Specifications:

Name: ECS TR10RS1

ABI: x86

Processor: Intel Atom Z3735F

Graphics: Intel HD for BayTrail

Resolution: 1280x800
[Device Reviews and Information] carlskie:
how to root chuwi vi8? i tried kingoroot but it always failed
[Device Reviews and Information] myke66:
Can't find this anywhere obvious, but once in Android how do I boot back to windows?
[Device Reviews and Information] dirtykimchi:
Pull down from the Top right side & there is a button to reboot to Windows.
[Device Reviews and Information] frapiccio:
Hi, I have a Chuwi vi8 Windows only version and after updating to W10 I've had touchscreen issue, but the same issue happen on march 2015 so I try to fix it in the same way... Error! Now I have acidentally deleted the intel graphics driver and the chuwi show ever the black screen.

To restore it the only way is to install windows from USB drive?

The model no of Chuwi is CWI501 and code is Q32G2214121****, could I install on it the dual boot ROM? I want to use it also in the Android OS.
[Device Reviews and Information] CosmicDan:
You probably can't have dual boot, depends. Check your BIOS (EFI) and see if it has options for multiple OS first.

If not, there might be some way to chainload Android kernel via GRUB or something but I have no idea how to do that, if even possible...

You could try cross-flashing too, but I wouldn't risk it personally. However I recently accidently flashed the wrong BIOS/EFI on my dualboot model, luckily it didn't brick but it was wrong model and still worked fine (I had Android removed). Now I am back to original BIOS/EFI and trying to restore Android + Windows and it's a pain, using Intel Flashtool and stuff.

I got Android installed OK via Flashtool, but it consumes whole storage. I need to figure out how to resize my Android /data partition to make room for Windows partitions, I always used Paragon USB stick on PC but it doesn't support 32-bit UEFI...

...I'm also not sure of the order of partitions. Does anybody know if the Insyde dualboot system is picky and requires e.g. Android kernel and Windows boot partition in a particular order or location on the partition table?

Sent from Xperia Z via Tapatalk
[Device Reviews and Information] frapiccio:
Thanks, how can I check if UEFI support multiple boot? I entered in UEFI and found that is made by Isyde.

The series no is 141212***.

Inviato dal mio D5803 utilizzando Tapatalk
[Device Reviews and Information] a6vision:
Help

First i bought a my chuwi vi 8 with dual boot. Then i have deleted all Partition to install windows 10.

But now i want to back to original dual OS windows 8 OEM and Android Kitkat.

How do i do guys? Please help me?

:(:crying:
[Device Reviews and Information] CosmicDan:
I literally just said. Check your UEFI (BIOS) settings to see if there is an option for it. You can select multiple OS combinations, like Android + Windows, SteamOS; its not hidden or hard to find - at the top on the second or third page from memory.

This is what I'm trying to do too. I got the original firmware files via the Chuwi forum/bbs which includes everything for my model, but it's difficult to understand included Chinese documents even with translator so I'm mostly guessing around without much luck.

Sent from Xperia Z via Tapatalk
[Device Reviews and Information] frapiccio:
Ok, I can't go dual boot, but actually the touch do not work, so I have the W8 ROM for vi8 <1500000 (mine series no) but hownto use H2OFF.exe? It create the bootable USB drive with windows?

Wich software do you use to repartition the device? I found and try couple but at the moment of the repartition the software won't start until you pay the license

Inviato dal mio D5803 utilizzando Tapatalk
[Device Reviews and Information] CosmicDan:
Never heard of this H2OFF thing. I use Rufus (free) to create bootable USB, then just copy the Windows 8 installation files over. Comes in two parts labelled USB1 (32-bit EFI boot stuff) and USB2 (the actual Windows 8 install files), copy them both to Rufus formatted USB stick (don't think it matters if FAT32 or NTFS but try one if other doesn't work) and just boot from that via USB Keyboard method (keep pressing Esc on boot, I think, maybe F2 or Delete - can't remember).

Pretty standard stuff, the part about making EFI bootable USB stick anyway. Can Google for more guides if you need them. The most important part is making sure the Windows files are 32-bit EFI (which the files distributed by Chuwi are), but in theory any Windows 8 Home OEM files should work I think (as the license is baked into EFI itself).

Sent from Xperia Z via Tapatalk
[Device Reviews and Information] frapiccio:
I've never flashed Windows from USB or either way. I have downloaded the windows rom from here http://www.needrom.com/download/chuwi-vi8/ but the file is in .wim extension, and launching H2OFFT-W.exe it can't find the rom.

Anyone know how to reinstall w8.1 with proper dirver?

Now I have on chuwi w10 but the touch won't work and windows updater want to install kmfd driver, but it fail, the touch still not work.

Anyone can help me?
[Device Reviews and Information] GalaticStryder:
If you've got a Windows computer around, why don't you try Manufacturing Flash Tool from Intel? You'll need to disable driver signature and then download the needed files here: https://mega.nz/#F!uEAzBQjT!S7jMaqeQSVC0-QlgCkVXGQ

This guide is in Spanish and has some pictures as well. Modifying the partition table and modding the system.img is also possible, I'm going to try cleaning up this Chuwi ROM tomorrow maybe.
[Device Reviews and Information] CosmicDan:
Yeah already done that, that's only for flashing Android (which works fine). Now I'm working on Windows 8 reinstall from official firmware download (Chuwi forum, not needrom - they're all incomplete or wrong model).

The Windows PE system has partition scripts and other automation tasks, but from what I can tell it seems to completely erase all partitions - so installing Android first might not have been right. However, in the firmware files, there is another Intel flash script labelled "keep_Windows" or something like that - so I think after Windows 8 install, then I will try Intel flash tool again to get Android back.

Sent from Xperia Z via Tapatalk

EDIT: This is where I downloaded the firmware files from, everything is included (all tools, Android + Windows 8 files) and it matches my model - http://bbs.chuwi.com/thread-1354-1-1.html

Everything was included with it, including chinese guides. But I also checked this French guide as reference - http://www.tablette-chinoise.net/forum/dual-os-flash-bios-android-windows-8-1-t6953

EDIT2: The problem I'm having now is that WinPE installation media requires NTFS (wim file is >4GB) but EFI boot only supports booting from FAT32 USB sticks (this is a common thing, not exclusive to the Chuwi's weird/cheap UEFI). So I THINK I need two different USB sticks inserted - one as FAT32 for the WinPE (even though guide says to use NTFS) and another for the actual Windows 8 source files. But I don't have a powered hub that supports two USB devices simultaneously so... :(

EDIT3: OK, I solved the EFI boot from NTFS stick by formatting it with GPT when burning the WinPE ISO in Rufus. Finally, some progress!

EDIT4: Aaaaand now the WinPE environment fails to detect or mount my USB key at all, simply doesn't exist... what a pain this is.

EDIT5: OK, all solved once I got my hands on a POWERED USB hub. The linked French guide is perfect, and the Windows 8 install files from Chuwi do indeed resize the existing Android partition. Hurrah!

Last point - I have noticed that the Windows 8.1 product key provided by Chuwi in this firmware has been blocked by Microsoft. Even though we have SLIC system (or something similar) in UEFI, this means that the Chuwi Windows 8 system is no longer genuine. This MAY have been caused by the fact that I re-flashed my UEFI firmware (aka BIOS). Luckily though I made a backup of my old Windows 10 system from when I originally upgraded, and was able to extract the key via ProduKey and use it to reinstall Windows 10.
[Device Reviews and Information] ruva:
After update to Window 10 its ok. After Recovering from Windows the touch is crazy. No FW on Chuwi web-page.
[Device Reviews and Information] CosmicDan:
First match on Google for 'Chuwi vi8 touch drivers':

http://techtablets.com/forum/topic/new-drivers-for-chuwi-vi8-windows-10/

Sent from Xperia Z via Tapatalk
[Device Reviews and Information] XblackdemonX:
http://www.needrom.com/download/chuwi-vi8-dual-os/