Virus protection

I picked up a virus whch was serious enough for windows to freeze my computer (according to the onscreen notification) I am covered by AVG virus protection until the middle of this year. My question is why didn't AVG support pick up the virus, there was no notification or assistance from them. I get plenty reminders to purchase more products, but am now wary as to the best product to buy.

Hello Roy,
We apologize for the inconvenience. If you have any threats in your computer, AVG will detect it and notify you. Could you please send the screenshot of your threat message so that we can assist further? Please click on the following link http://support.avg.com/SupportArticleView?urlname=How-to-create-a-screenshot to send the screen shot.
Thank you.

Roy, For your info, just in case that you are unaware, you can post the screenshot here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions. 
AVG Guru