The adminpak.msi installation to provide AD tools is not compatible with Windows 7. Instead you must install this Windows 7 update.
http://www.microsoft.com/download/en/details.aspx?id=7887
Once installed, additional Windows 7 features are available in the Windows 7 features area of the Programs and Features, Control Panel applet. Select the ones you require.
Windows 10 RSAT tools download
https://www.microsoft.com/en-us/download/details.aspx?id=45520
RSAT tools are optional features in Windows 10 Pro after 1809
keyword RSAT
