littlemamas,
Well, if you dont want to register nothing....then you will not be able to continue the use of Avast. It reguires a registration code which you will be sent via email.
Once you have the code, the use of Avast, along with program and database updates are FREE.
The registration only takes a minute, and believe me, the information you provide is minimal, basically your email address.
YOU WILL NOT BE GETTING ANY SPAM FROM AVAST, OR ANY UNWANTED EMAIL ADS.
The decision is yours.
Good luck no matter what you choose to do.
techie