Back then was on McAfee, still got infected, even with the latest virus database, tried Norton, was heavy on the system, just endured with McAfee, until I discovered AVG. Never had an infection to date. Have used it to clean up infected machines that had other anti-virus systems. Light machines can handle it.
If you do not have abundant Internet data, you can disable auto-update, then manually update when you have the data.
They tried to bury us, they didn't know we were seeds.