EDIT2: if you consider an ARM board that you can install custom OS on as a PC – admittedly, bit of a stretch – then you can grab UGOOS AM6B plus / AM6 plus / Minix u22x-j max
install CoreELEC on it and enjoy DV.
https://github.com/CoreELEC/CoreELEC/releases https://discourse.coreelec.org/t/dolby-vision-for-minix-u22x... Recommended settings: https://justpaste.it/divn9 Installation instructions 1: https://discourse.coreelec.org/t/guide-s922x-j-ugoos-am6b-co... Installation instructions 2: https://www.reddit.com/r/PleX/comments/1ajszn9/remux_lovers_...
EDIT: I forgot that for Windows playback, you also need the HEVC and DoVi codec packages.
https://apps.microsoft.com/detail/9P9ZH5FL1BFK https://apps.microsoft.com/detail/9PLTG1LWPHLF https://apps.microsoft.com/detail/9nmzlz57r3t7