invalid license key - too long

Avast Free Antivirus / Premium Security
1

I use an old version of free avast: 4.5.
I reinstalled the OS and in order to update and use it I submited the e-mail but the received key is too long.
I don’t want another one, I’m happy with it, is light on my old computer and doesn’t conflicts with the firewall and antimallware software.

Thank you,
Cata

2
I use an old version of free avast: 4.5.
this is not supported anymore....

what OS do you run?
if you run W98 you can use Clamwin. http://www.clamwin.com/
ClamWin does not have realtime protection unless you also install ClamWin sentnel. http://sourceforge.net/projects/clamsentinel/