Windows Mixed Reality consists of the following major software components:

  1. Mixed Reality Portal
  2. The Mixed Reality feature-on-demand package (FOD)
  3. The Mixed Reality headset and motion controller driver, also known as the HoloLens Sensors driver.
  4. The Mixed Reality motion controller model drivers

In addition, using Windows Mixed Reality in SteamVR requires the following software:

  1. SteamVR
  2. The Windows Mixed Reality for SteamVR component

To get the download links for all these MR drivers & software visit docs.microsoft.com.