windows tablet won't boot

[farhanorakzai]

i have a friend's lenovo yoga tablet 2 with windows. it was working fine until he put the windows 10 technical preview on it. now when you start it up it says preparing automatic repair and then says automatic repair couldn't repair your pc and takes me to advanced options. i can't refresh or reset it because it asks to enter the password but the onscreen keyboard does not appear and it doesn't have a usb port to plug one in. i can't even roll back to the previous version of windows because i have to enter the password and the keyboard won't show up. what can i do?

[TetraSky]

@farhanorakzai
You will need to disable Secure Boot in the bios of the tablet, as it is no longer the "same OS", it will refuse to boot (hence your current problem).

I suggest disabling secure boot, then see if you can now access windows, if not, then go in Recovery Mode with Volume+ right at boot, to reformat to Windows 8. After that, you will be able to upgrade to windows 10.
 
Alternatively, you could use a OTG micro USB to USB cable, then you will need to plug that on a USB Hub. Plug the keyboard and mouse to the hub, along with a USB drive that contains the ISO of Windows 10.
On boot, go in the bios, change boot order, choose the USB drive. Either Repair or reformat it. (Need a hub for keyboard and mouse, because the touchscreen will most likely not work during install or repair) Sounds like a hassle? Yes? Then disable Secure Boot.
 
This is all that I had to do with my Dell Venue 8 Pro tablet, especially the Secure Boot part, when I first upgraded to Windows 10 on it.

[EliasNM]

Press the volume+ and power button and you should see a recovery mode to reset it with. Just remove all SIM/SD cards out first.

[soaringchicken]

Why you shouldn't install W10 on tablets, and I'd think you'd have to pretty much format and do a clean install now. 

[farhanorakzai]

@farhanorakzai

You will need to disable Secure Boot in the bios of the tablet, as it is no longer the "same OS", it will refuse to boot (hence your current problem).

I suggest disabling secure boot, then see if you can now access windows, if not, then go in Recovery Mode with Volume+ right at boot, to reformat to Windows 8. After that, you will be able to upgrade to windows 10.

 

Alternatively, you could use a OTG micro USB to USB cable, then you will need to plug that on a USB Hub. Plug the keyboard and mouse to the hub, along with a USB drive that contains the ISO of Windows 10.

On boot, go in the bios, change boot order, choose the USB drive. Either Repair or reformat it. (Need a hub for keyboard and mouse, because the touchscreen will most likely not work during install or repair) Sounds like a hassle? Yes? Then disable Secure Boot.

 

This is all that I had to do with my Dell Venue 8 Pro tablet. Especially the Secure Boot part.

when i try to reset it says unable to reset your pc. a required drive partition is missing

[TetraSky]

when i try to reset it says unable to reset your pc. a required drive partition is missing

And I'm guessing your friend never made a recovery disk/usb drive/iso, of the tablet's OS?

Because if it says that, it means the partition containing the recovery files is gone (your friend probably deleted it to get more free space, like I did on my tablet).

You will need to go the long way, and use a usb hub to reinstall windows 10.

(Either that, or if you're lucky, you might be able to do a factory reset in the advanced options, look for it. it SHOULD be there. It was when I used the technical preview (but seriously, why the technical preview, the OS is out already...))

[farhanorakzai]

And I'm guessing your friend never made a recovery disk/usb drive/iso, of the tablet's OS?

Because if it says that, it means the partition containing the recovery files is gone (your friend probably deleted it to get more free space, like I did on my tablet).

You will need to go the long way, and use a usb hub to reinstall windows 10.

(Either that, or if you're lucky, you might be able to do a factory reset in the advanced options, look for it. it SHOULD be there. It was when I used the technical preview (but seriously, why the technical preview, the OS is out already...))

i have a micro usb to usb cable and a usb male to female to plug in a flash drive with the windows iso on it, but it won't boot from the flashdrive 

[TetraSky]

i have a micro usb to usb cable and a usb male to female to plug in a flash drive with the windows iso on it, but it won't boot from the flashdrive 

Did you disable secure boot in the bios of the tablet?

It also prevents booting to other devices. (I believe there might be something else, like fast boot? just make sure it's recognized by the bios and make it the first boot)