I should've clarified, I have already activated both Deskscapes and Fences, it keeps prompting me to activate Decor8 which was not part of the bundle and it's a wee bit annoying.
I think you may have selected the option to install a trial of Decor8 too during install of one of those.
If you open Add/Remove programs you should be able to find Decor8 and uninstall that which will deal with your issue.