digger1 wrote:
I don't want ANYTHING to get through, not even a tracking cookie! I want Pentagon-level security.
Security is usually inversely proportional to ease of use, are you sure you wanted to swallow it? I'm sorry but a simple anti-virus program will never give you Pentagon-level security. And tracking cookies aren't really security risk, you are losing unnecessary sleep if you worry too much about them.
If you are using Windows, a good measure is to use Sandboxie. Use your sandboxed browser to surf unknown sites and clear the sandbox regularly. Use the unsandboxed browser or better yet another totally different browser to surf trusted sites (like email, bank, etc.).
If you are paranoid, surf inside an emulator and revert the vm to a snapshot after each session.