Ouch thats horrible! Thanks for the warning, we use McAfee it came on our laptop and we paid $39 for the full yr upgrade. I find they work well I used a free ware one may have been AVG before but found I still got a lot of viruses. When we went to McAfee it's always catching stuff at least once a week and I don't go on many websites.
There's new viruses released almost every day it seems I don't think it matters what software you use you many always get one or two that slip through the systems.