Windows Firewall - can not untick the box in the Private column

I am in Control Panel\System and Security\Windows Firewall\Allowed Programs (Windows 7).

I have found the file I wish I block from accessing the Internet in the list.

I can not untick the box in the 'Home/Work (Private)' column.

This means it's allowed to access the Internet, I believe.

Any idea why I can't untick the box?

Flatiron said:

Top right of columns click on "Change settings", then you should be able to check something.

Allow a program to communicate through Windows Firewall

Understanding Windows Firewall settings

I opened Windows Firewall with Advanced Security.

I set Inbound and Outbound connections both to Allow (for Domain, Private and Public profiles).

I then created a new Outbound rule for the file.

Worked a treat (Y)

Many thanks!