Hi,
As per the issue description you are willing to use emoji on Windows 7. Microsoft added monochrome Unicode emoji coverage to the Segoe UI Symbol system font in Windows 8 and added color emoji in Windows 8.1 via the Segoe UI Emoji font.
I would suggest you to install the update provided in the article mentioned below and see if it helps you to use emoji on Windows 7. This article introduces an update to the Segoe UI symbol font in Windows 7 and in Windows Server 2008 R2. This update adds support for emoji characters and some control glyphs that are included in Windows 8 and in Windows Server 2012.
An update for the Segoe UI symbol font in Windows 7 and in Windows Server 2008 R2 is available
Hope the information provided is helpful. Do let us know if you have any more concern related to Windows. We will be more than happy to assist you.
Regards,