First, Windows 7 is not technically supported. PolicyPak only supports versions of the operating system which are supported by Microsoft. This is covered in this faq: https://kb.policypak.com/kb/article/1082-which-windows-10-releases-are-currently-supported-by-policypak/
That being said, Windows 7 and PolicyPak support is BEST EFFORT.
Additionally PolicyPak requires drivers which are signed and work only with Windows 10 and later. As such, the following features are EXPECTED to be non-functional even if the CSE installs properly on Windows 7:
There could be more pieces which are expected not to work in PolicyPak, but these are the known items.
Note for best functionality you should add some additional Microsoft .Net software.
There are basically two major versions of .Net CLR: v2 and v4.
It is recommended to have both installed (3.5 + 4.8).
Note there is never any reason to install outdated versions of .Net, so we recommend clients continue to have the most recent .NET installed with all security updates, and keep installing and updated all the time.
More details about .Net framework versions can be found here: https://docs.microsoft.com/en-us/dotnet/framework/migration-guide/versions-and-dependencies