Edit, probably due to not updating the BIOS via Windows first i can not boot to windows now. Use this on your own risk.
Do not forget to flash the new bios first, this is included in the files and the how to from Pipo tells this:
Copy the bios file to U disk, then connect the U disk to X7S, right-click flashwin32.bat
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Original post:
Did the same thing a week ago then it did not seem to work, had another try today and it did so thought i should share it.
Think its due to a different USB stick

What do i need:
- USB drive
- Download (from Geekbuying blog): http://blog.geekbuying.com/index.php...86083-20150502
How to:
- Download the 3 files from the Geekbuying blog and unrar them to a folder.
- Format your USB drive (fat32)
- Go to the just unpacked folder and browse to: 8G-Android4.4.4_20150420/JSmini_PC01S_Android4.4.4_20150420_[Z3735F_wifi8723BS]_GMS_userdebug_8G/
- Copy all the files (not the folder, but all files in it) to the root of your USB drive
- When done remove the USB from your pc
- Shut down your X7s
- Connect the USB drive
- While booting hold the F7 key on your keyboard
- You will get this screen:

- Just press enter
- wait out the instalation DO NOT press any button, if it says press any button to continue or something like that)
- The X7s will reboot and enter the boot menu with only android sign. Wait for it to boot.
- You now get the standard Android setup.
Hope this helps

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