This tip which I found on Martin Lewis' website has just saved me £50+. Our Norton has just exired and was oing to cost £55 to renew, DH was all keen to go for one of the free antivirus programs you can download like AVG or Avast but I was a bit skeptical.
There was a tip on Martin Lewis to say if you do online banking with Barclays you can get a years free antivirus with Kaspersky and a years free Norton if you bank with HSBC. On the website is all the info about the other free antivirus programs which are available too.