While I have not tried it yet, there the developer built the HCI layer to talk directly with Bluetooth keys on computers prior to Windows 10. It is available here: WinBeacon
This will only work on desktop computers, not on mobile phones. If you are interested in mobile phones with Windows 8.x, I do not believe that there is any solution. I spoke with Microsoft engineers who confirmed this to me.
Windows 8.x , Bluetooth LE ( ) . API API, Bluetooth LE. - , iBeacon BLE .
Microsoft , 8.x, Windows 10.
, Windows 8.x, , Windows 10 Android Beacon Library Windows .