Avast is a good antivirus and provides a decent level of security protection. The free version comes with lots of features, although it doesn't protect against ransomware. If you want premium protection, you'll have to upgrade to one of the paid-for options.

Does Avast steal your information?

Avast is harvesting users' browser histories on the pretext that the data has been 'de-identified,' thus protecting your privacy. But the data, which is being sold to third parties, can be linked back to people's real identities, exposing every click and search they've made.

Is Avast bad for your computer?

Avast Free Antivirus: Security and privacy features

Avast's Secure Browser is intended for online shopping or banking, but you'll need to download it separately.