I've been running an Odyssey from Seeed Studio for a while now, as an in-house dev server running SQL Server and IIS. It's the form factor you want, and it's been flawless (even though it's underpowered for what I'm doing with it.)

https://www.seeedstudio.com/catalogsearch/result/?q=win10

I've long wished that Microsoft would port Windows on ARM to the Raspberry Pi!