hai, i have annoying problem. i’m install avast profesional 4.6.763, after i key in registration key, it’s automatik updated and upgred to avast 4.7, and it’s prompted me registration key, when i key in the same registration key, it’s say " invalid registration key" why this is happen and what should i do??? please help me…
do you have a legitimate key? LOL
take care.
Download the latest version of avast and save it to your HDD, download the avast! Uninstall Utility, find it here and save that too.
Uninstall avast, reboot, run the avast! Uninstall Utility, reboot and install the latest version that you downloaded.
Try the registration key again -
Q: “Invalid license number”. Why? http://www.avast.com/eng/faq-registration-license.html#idt_220 Or Insert Registration Key - Video
@ mat77
You might want to change your avatar for another. We try to keep avatars around 100 X 100 for those who don’t have high resolution monitors.
Ups, I was so comfortable in underpants 
That’s the thing about computers you can get just too comfortable in your underpants (no web cams) ;D typing away.
Jajajajaja!!!, very funny, big LOL :'D
ok thnks DavidR…i’ll try ;D 
No problem, welcome to the forums.
Let us know if you experience any further problems.