Yup, you heard it right, avast just gave their universal key for avast free installed on windows xp. I am going to post the original message. There are still a few of us using windows xp
Good news! You no longer need to register
Newer versions of Avast Free Antivirus will no longer ask you to register, and older versions will keep working even after they’ve “expired”. If you’re using Avast Free Antivirus version 7 or older,
Universal Key: W11332244H9900A0420-8MRTR8W5
