NoviSign has 2 player apps which can run on Microsoft Windows operating system:

The new native Windows player app.
Here is the link to download the new Windows app for 64bit Windows (only Windows 7 and higher).
Here is the link to download the new Windows app for 32bit Windows (only Windows 7 and higher).
And here is the installation manual for the Windows app (which is stable, configurable and has more features).

The old Air player app, which is based on Adobe Air (needs to be installed and can run on Mac OS as well). In case you have older Windows than Windows 7, you can use this flash player.
Here is the link to download the old Air app (which can run on old Windows versions such as Windows XP and Windows Vista).
And here is the installation manual for the Air app.
 
Microsoft Windows