Facts:
1. Blaster is a self perpetuating worm. It is not distributed via infected files.
2. The Blaster worm works by exploiting a vulnerability in the RPC service. This vulnerability was patched years ago. If you have run windows update within the last 5 years you are fine.
3. The report of a "virus" in the 2x2 cube add-on has not been confirmed and seems unlikely.
Conclusions:
1. You are an idiot.
2. You are engaging in pointless, uninformed fear mongering.