I am trying to prevent users from (for example) running d:\skype.exe. I have
a user policy package which applies to user configuration, computer conf,
and security settings. User configuration works fine, but there is no change
when I making changes in computer configuration branch... for example adding
d:\skype.exe as a disallowed path in Computer configuration -> Security
Settings->Software restriction policies -> Additional rules.

Does anybody have any idea what am I doing wrong?