Avast One (free) will not update virus definitions

Avast One Avast One for Windows
1

My Avast One (free) running on a windows 10 machine has suddenly popped up a warning saying my virus definition are out of date (25/10/2025)

my avast is 25.9.6177 build 25.9.10453.762 released sept 9th 2025

I’ve tried updating the virus definitions (current version is apparently 250916-0) but it still says virus definitions are out of date (even after a restart)

I’ve tried repairing the Avast app via settings/troubleshooting then updating the virus definitions but it still claims definition are not up to date (even after restarting)

I’ve tried uninstalling and reinstalling avast again without sucess

any suggestions?

2

Managed to solve things myself by uninstalling avast again via the windows uninstall tool, then reinstalling it

The build is now showing as 25.9.10453.762a rather than 25.9.10453.762 and there is a ‘scam guardian’ option on the main screen which i don’t remember seeing before (so a problem with an update introducing that not fully working perhaps?)

but it all seems to be working again

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