Delete MSN Gaming Zone

I am trying to delete all the MSN software that came per-installed on my Hewlit Packard PC (I don’t want to buy it). I successfuly used add/remove to get rid of 3 MSN packages. MSN Gaming Zone is not listed in add/remove. Everytime I physically delete the files from the Program Files folder, 1 minutes later they’re BACKKKK…all the files reappear in the directory!! no kidding!!!! How do I delete these files?