2nd computer

[Bobr]

I have Avast 4 on one computer. Have 2nd computer networked at home. Need Avast on 2nd computer.  What must I do?

[DavidR]

Presumably you aren't using avast 4 server edition (the forum you posted on) ?

What version of avast are you using, avast for Home or Pro ?

If a Home user then the second system is also used for Home and Non-Commercial use (both must apply) then you can use the same registration key that you were emailed in the second system also.