It seems that each time I log on to my PC, I get a Spybot message box saying that an important registry entry has been changed. I don't know what this is and the Deny Change button isn't active. The only option I have is to click Allow Change. I can't even close the window. The change is coming from ActiveX Distrubution Unit - is it safe to allow this change. I have no idea what it is. Screen shot attached.