There's a thread on the difficulties of "Activating 10-bit HDR viewer in Windows?" (
https://forum.blackmagicdesign.com/viewtopic.php?f=21&t=157936).
However, running some tests it seems to me that DR is among the programs which completely ignore Windows colour management altogether.
That means that on any software calibrated monitor (like my notebook screen), contrary to what happens, for instance, in Adobe Photoshop, displayed everything more or less wrongly, as if there was no colour profile in use, but according to the standard sRGB profile.
That make colour correction with DR in Windows useless even in for non-HDR, unless you use a hardware calibrated monitor (which does not exist for Windows notebooks, as afar as I know).