Microsoft stopped supporting Windows XP with security updates, making it more vulnerable and a prime target for hackers. Avast Antivirus will keep your old Windows XP PC protected regardless.
AV Comparatives called Avast "the antivirus with the lowest impact on PC performance." It has almost no impact on your Windows XP's performance. Plus, advanced features like Cleanup and Browser Cleanup make things run even faster.
AV Comparatives successfully tested Avast on Windows XP. And being Windows XP's official consumer security software provider is yet another reason why more than 230 million users trust Avast.