I couldn't find in the tutorial what this means exactly. Should I generally accept or deny the change? It comes after rebooting so my guess is that Spybot has changed the registry to eliminate a bot, but the malware is trying to undo Spybot's change.

I naively accepted some changes initially and checked "remember this decision", but on later thought decided I should instead be rejecting them. Is there any way to go back to undo the previous "remember this decision?"