AVG’s Internet Security is an efficient program still compatible with Windows Vista, which is still updated by the software developer, unlike most similar products.

Does Avast work with Windows Vista?

We still support Avast Free Antivirus for Windows Vista to an extent, updating our virus definitions to ensure that our users continue to get protection against the latest malware threats.

Does Windows Defender still work on Vista?

Windows Defender comes with Windows Vista. If you use Windows Vista, do not download Windows Defender. If you use Windows XP SP2 you can (and should!) download Windows Defender for no charge.