Hei all.
I recently how problems with my pc, and then reinstal windows xp.
All was good, and then i go instal my favrite av. Avast of course. 
Afer that i tray to insert my old IS licence but its “NOT VALID”. Now i go to my account to download licence (i think maybe this get damaged), and cant find my licence.
I how free 3 years IS licence, and left around one year until licence expired.
I em it worker,and all friends recomend to instal avast, and then i get this licence.
And now i em sad, because this licence working befor and now dont. 
Please help me. I whant back my Avast Internet Securyti.
Maybe this will help.
Thanx, but no help. Maybe this is because i dont buy license? I get it for reward.
P.S. Find the mistake, i watch little new avast interface on web and find button to recomand avast to friend, after that i get page open where i can download my free license again.
Thanx on hellp.
Problem is because license that you were given as reward is for 1 PC only and Avast thinks that your license is still on your PC.
I think you should contact support via tickets.
https://support.avast.com/Tickets/Submit/&cls01&ptf01&lic02&scr06
As I understand it (Reply #2), the problem is already solved. 
I’ve just now figured it out. Haha
You’re welcome, glad it all works.
It didn’t, all I got was this:
"Dear customer,
we are sorry, but our records show no valid purchases with the e-mail address you specified.
Please make sure the information you supplied is correct, and the original purchase was carried out using this email address.
If you purchased your license from an Avast reseller please contact the reseller directly (http://www.avast.com/locate-dealer).
Best regards,
the Avast team"
I paid £14.99 direct to Avast on debit card for a 1-year licence just a few days ago. However like the OP a PC crash necessitated me reinstalling Windows XP Pro and Avast Cleanup thinks mine is new machine, it isn’t.
Any way around the problem?
Submit a ticket: https://support.avast.com/Tickets/Submit