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Windows 10 full protection

Important info for Windows XP users

Avast Free Antivirus still protects Windows XP owners with regular virus definition updates. But we no longer provide program updates, new features, bug fixes, or support for Windows XP. We strongly recommend upgrading to the latest version of Windows. (Remember, Microsoft ended its security updates for Windows XP back in 2014.)

Safe upgrade to Windows 10

Runs smoothly even on Windows XP

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.

Approved antivirus for Windows 10

Official antivirus for Windows XP

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 4 million users trust Avast.

Avast 防毒軟體與 Windows 108.187VistaXP SP3 相容

Avast also offers you security solutions for your Android and Mac

很多人都分享了自己的經驗

我們也想聽聽您的看法。因為您是我們努力不懈的動力。

Avast Free Antivirus for Windows 10
5

It's clean, easy, and works.

Avast Free Antivirus for Windows 10
4

It's very easy program

Avast Free Antivirus for Windows 10
5

easy to used < its the best

Avast Free Antivirus for Windows 10
5

I love Avast, I have used it for at least 5 years or maybe more. will continue to do so

Avast Free Antivirus for Windows 10
5

easy to used < its the best

Avast Free Antivirus for Windows 10
5

easy to use and download

Avast Free Antivirus for Windows 10
5

I love that it protects my computer, cell phone, and even my iPod. And I only have to have one account! Super easy

Avast Free Antivirus for Windows 10
5

Years and years using this software, I like it and lots of friends and family are using it too. If your computer is infected it goes straight to the base of your O.S. and kill the virus. Love it !

Avast Free Antivirus for Windows 10
5

It is the best antivirus on the market. Very efficient and easy to use. Would definitely use again and again.