I downloaded Avast from ZDnet,when my trial period ended I downloaded my info to get a key for home use I was e-mailed a key serial # When I type it in I recieve a message stating invalid key #, Please help, Thank You, James Poore. I am running Windows XP 256MB I assume 900 gigs,2 harddrives C and F, C has 9.48 Gigs and F 30 gigs, total 40 gigabytes, I am going to try to re-enter key using #'s from top of keyboard instead of # pad' once again, Thanks