(DOCSP-14404) Add administrator reqs to installing on Windows (#332)

* Add administrator reqs to installin on Windows

* (DOCSP-14404) Add admin requirement to installing Compass on Windows

* Include tech review from Massimiliano

Author: JuliaMongo

source/install.txt

@@ -36,11 +36,15 @@ Select your operating system:
          - 64-bit version of Microsoft Windows 7 or later.
          - MongoDB 3.6 or later.
          - `Microsoft .NET Framework version 4.5 or later <https://www.microsoft.com/en-us/download/details.aspx?id=30653>`__.
-
+         
            The |compass-short| installer prompts you to install the
            minimum required version of the .NET framework if it is not
            already installed on your system.
 
+         - Starting the installation as an administrator if you are running a silent
+           installation using Microsoft PowerShell or installing on
+           Azure Virtual Desktop Infrastructure (VDI).
+
      - id: linux
        content: |