You know, you almost don't need the icon here.
Apparently Win7 boxes are now under determined attack from a highly knowledgeable party who have already compromised the signing keys that are supposed to ensure that updates are trustworthy. You can try to resist these attacks by configuring the PC, but the attacker keeps shifting their target and has (probably) an endless supply of vectors available to them. The only sure way to defend your PC is to hide it behind an independent firewall and block connections to the outside world.
How is that different to XP?