Firewall rules dialogue executables not available

After upgrading to 21.1.1.7 in Windows 7 x64 home premium, I noticed several entries in the history logs that were accessing the internet.  I created firewall rules to block a few of them.

 

However, taskhost.exe and audiodg.exe were not available in the dialogue box.  They exist in the system32 folder, but are not offered as a choice to configure access to the internet.  Are they critical to NIS operations?