Windows 7 Professional can be used to create AppLocker rules. However, AppLocker rules cannot be enforced on computers running Windows 7 Professional. What is the sense of that? I was thinking of upgrading to Win7 so I checked out what was available in all the versions. I wanted to use and become familiar with applocker but I don't know if I want to justify the expense of the Ultimate version. I think the Home premium version can be adequately secured. Looking for opinions on whether Ultimate is worth the expense for home use.