Decorator Pattern Afterthoughts

The only issue I ran into with my plan is that if I used the decorator to control whether or not the Viruses can disable antivirus, then I'd be  essentially replecating what I've done with the strategy pattern. For now, I'm just using decorator to make viruses 'stealth', and give them the ability to kill computers. When I think of another use for the strategy pattern, I'll implement it there and then add to my decorator pattern.