Registration key when installing Avast! Home on more than one computer

[epp]

If someone has more than one computer at home and wants to install Avast! Home on all of them, is using the same registration key allowed for all installations, or should different e-mail addresses be used to obtain different keys - one for each installation?

I looked at http://www.avast.com/eng/faq-same-license.html, but it doesn't explain whether or not using the same key for more than one installation, is valid or legal.

I have Avast 4.8 Home installed under Windows XP and Avast for Linux installed on a different computer, but I obtained one registration key for each, using two different e-mail addresses.

Thank you.

[Lisandro]

You can use the same key for all home computers.

[ardvark]

You can use the same key for all home computers.

Thanks Tech! I just learned something new about avast today!

Although, I'm assuming this doesn't apply to the Professional version.

[epp]

I don't think that would apply to the Professional version.   

Thanks for the info. 

[Lisandro]

Although, I'm assuming this doesn't apply to the Professional version.

No, it does not apply for the Professional version.
You have, on contrary, a Family Pack for avast Pro licensing.