I bought a Lenovo ThinkPad 10* with Windows 8.1 Pro some months ago, and I have been quite satisfied with it, although it is has been a bit slower than I expected, and the tablet often had problems in the docking station (ThinkPad Tablet 10 Dock).
It turned slow and unresponsive and had to be disconnected from the dock to recover. Mostly it worked just fine for most of my purposes: Word, Power Point, Photoshop, Audition, Audacity, InDesign, Atari’s Magic: Battlegrounds.
However, it struck me that I could try a fresh install with an original MS Windows 8.1 Pro medium. I did, and I only installed the drivers from Lenovo that had to be installed, such as Sound, Intel Chipset, Bluetooth. I also disabled the encryption chip. (Who the hell trust those chips, anyway?)
So far, the effect has been overwhelming. The tablet is much more responsive and quicker at loading than it was with the preinstalled Windows 8.1 Pro and the Lenovo drivers and programs. And so far — alas — there has been no strange behavior in the docking station. Will it last? If it does, then Lenovo needs to rethink its approach to preinstalled software.
* 4GB RAM, Intel Atom Z3795 (64bit), 128 GB SSD, LTE