What type of OS is on the Linx 7, 8 and 10 tablets?

Windows 8.1 with Bing

  Can I download an instruction manual for my tablet?

Yes - you can download the manual for your Linx tablet on our Downloads page. You will also find a guide and video to help you get started with Windows 8.

  Do the devices have firmware based v2.0 level TPM?

Yes

  Does the keyboard trackpad support multi gesture?

No

  Can you add the tablets to a network?

No, they do not support domain joining so you wouldn't be able to add to a network.

  Can users drag and drop files onto the tablet from a PC/laptop?

No, it is not possible as the windows tablet cannot act as mass storage device like that. The windows tablets are essentially the same as a PC/laptop, just like if you connect two laptops via USB, they cannot read either or transfer files.

If the user wants to get files to their tablet, they should transfer to a USB key then use the OTG cable to connect to the tablet and copied them to the tablet or add them to a micro SD card and insert directly to the micro SD slot and copy to the tablet from there.

  There's no CD Key for the Office sub, so how would I re-install it once I've installed Windows 10?

The Office 365 is linked to the Win 8.1 OS installed on the device. If you try to change the OS you will not be able to use the software as it cannot be transferred.

  Do the tablets support GPS for Sat Nav applications?

No