Windows NT 3.1 ran on a 66Mhz with 16MB ram, the MIPS and Alpha versions that also existed at the time were incredibly fast if you could afford the hardware (I could not).
Theoretically, an embedded version of just the Windows kernel and basic services might fit that profile, if Microsoft were to resurrect a MIPS version. Also, Windows Phone runs on hardware that's not much faster.
Theoretically, an embedded version of just the Windows kernel and basic services might fit that profile, if Microsoft were to resurrect a MIPS version. Also, Windows Phone runs on hardware that's not much faster.