Avast premier about to expire!

Hello everyone, I have a question … I bought a year ago avast premier for 2 years, the problem is that now I get a message that expires in 20 days and asked me to buy another license … why ?? if this is the first year … I hope someone can help me … thanks!

(My English is very, very, bad, sorry)

You could try a repair of the Avast installation.
Go to Control Panel/ Progams,Features/Avast and then scroll to “Repair”
Make sure you reboot your System.

If that doesn’t fix the issue, you could have your license resent using original Purchase information, Reinsert it and see if that fixes the issue.

RESEND License:
https://www.avast.com/resend-license-paid.php

Also make sure your system time/date is correct/isn’t changed

Edit info

Is your system date and time correct?

yes! I don’t know what else do.

Perform a clean installation of avast.
Download the license file and use it.
That should solve it.

What do you mean by clean installation?I have to uninstall then install again? I’ve already downloaded the license again, and keep saying I have 20 days