Guy,
Last 2 day, My computer got reformat due to virus problem.
So when I want install this Avast Antivirus my register id invalid.
Anyone from this forum can help me.???
Till now … Bye
When you reformat and do a clean install, entering the old registration key should still be OK.
What version of avast do you have, Home/Pro ?
If home the easy option is to register again and a new key will be sent. Complete the avast! 4 Home Registration form and you will receive an email from register @ avast.com (without the spaces) with your registration key.