Sorry PepiMK, but I have little idea what you're talking about here.

I made it clear that this was the free version from the very start, so not sure what your comment about mentioning that is all about.

Here's how it looks to me: The free version doesn't replace an anti-virus since there is no real time scanning, so there is no reason for the Security Centre integration. If there is some Microsoft requirement, just don't install the Security Centre integration with the free version. In the previous version there was an option to do this in the installer (that didn't work, if I remember correctly), so let's go with that solution.