Free Antivirus Built with Award-Winning Technologies

  • Forrester
  • NSS
  • PC mag
  • Avast award
  • SC Media award
  • AV comparatives

With AI-driven threats evolving at a breakneck pace, you need a free antivirus that adapts at lightspeed

Computer viruses are now more sophisticated and harder to detect. Today’s e-threats - from Zeus P2P to Clop Ransomware - go straight for your wallet and are smarter than ever at evading detection, scaling across networks, and changing in response to thwarted attacks.

Bitdefender Antivirus Free for laptop

Bitdefender Antivirus Free for Windows keeps you safe, even against today’s constantly changing e-threats

By learning and monitoring the unique pattern of daily activity on your PC, Bitdefender Antivirus Free is able to instantly detect and isolate suspicious changes in real-time, no matter the source.
So you are shielded from known and emerging threats, including:


Financial extortion attacks that freeze PCs are on the rise, attacking everyone from individuals to global enterprises.


With cryptocurrency soaring in popularity, hijacking PC resources to mine for coins has become an all-too-common hazard.

AI-powered “spearphishing”

AIs like GPT-3 are now being exploited to write shockingly personalized emails that can dupe just about anyone.

“Zero-day” exploits

Every software update comes with flaws that need fixing. Until they’re detected, hackers use them as infection points.

Rootkits & Trojans

Notoriously hard to detect, these attack your PC’s central nervous system and use its credentials to steal & impersonate you.

Malicious websites & files

Malware can be embedded into almost anything you click on, including “next-gen” financial assets like NFTs.

Browse, click and download with confidence with Bitdefender Antivirus Free for Windows

Choose the free antivirus software that is both powerful and lightweight

 Many free antivirus solutions are as intrusive and resource-heavy as the viruses they’re supposed to stop. Only Bitdefender Antivirus Free is designed from the ground up to keep you safe without disrupting your workflow and focus.

  • Keeps you informed without bothering you

    Unlike other products, Bitdefender Antivirus Free is a non-intrusive software that only alerts you about threats when necessary.


  • Daily virus scans that don’t hold you hostage

    Worried about painfully slow scans that drag your system to a halt? Don’t be. Bitdefender’s customizable virus scans catch every threat without negative impact on performance.


  • Won’t interfere with your other apps

    Some antivirus tools are so intrusive they can feel like a virus. Bitdefender’s features stay tightly contained in one app, so they’re out of sight until you actually want to see them.


  • 100% free antivirus protection

    Get an antivirus that is totally free, no hidden costs, no trials required. Simply download and install the product by creating a Bitdefender Central account.

Bitdefender Antivirus Free benefits

And if you want encrypted privacy on top of your PC

You’re in luck: Bitdefender Antivirus Plus comes with SafePay and a built-in VPN (as well as a host of additional security features), so you can browse, shop and bank online from anywhere with a 100% encrypted, anonymous connection.

Upgrade and secure your PC with additional layers of security:

Antivirus Free

3 devices

Antivirus Plus

1 device

Old Price $
For the first year

See Terms of Use below.

Protects your Windows PC


Secures your personal files from encryption by ransomware


Prevents phishing and online fraud while you shop and browse


Checks your system & apps for vulnerabilities


Blocks web trackers from collecting your data

Old Price $
For the first year

See Terms of Use below.

Browse, click and download with confidence with Bitdefender Antivirus Free for Windows

System Requirements

  • Windows
  • macOS
  • iOS
  • Android
  • Standard
  • Premium

Bitdefender Antivirus Free for Windows


Operating System: Windows 7 with Service Pack 1, Windows 8.1, Windows 10 and Windows 11

Memory (RAM): 2 GB

Available free hard disk space: 2.5 GB free space

*System performance may be affected on devices with old-generation CPUs


Internet Explorer version 11

Bitdefender Central


Supported browsers:

Chrome 56 and later

Firefox 52 and later

Microsoft Edge

Is there a 100% free antivirus?

This is a product that is totally free, no hidden costs, no trials required. Bitdefender Antivirus Free for Windows offers you award-winning antivirus protection that’s light on your system and keeps you safe from viruses and e-threats.

How long can I use Bitdefender Antivirus Free on my Windows device?

With Bitdefender Antivirus Free for Windows you have permanent access to award-winning technologies that keep you safe from viruses and cyber threats. No need to worry about availability, you will be able to use the free antivirus protection without any validity due date.

Simply download and install free protection for your PC running any version of Windows (including Windows 10 and Windows 11) and enjoy a worry-free experience while gaming or browsing the Internet.

How can I check my computer for viruses?

Unexpected pop-ups, unfamiliar apps running in the background, slowdowns, and random sounds are some signs that your laptop or PC might be compromised. If you experience any of these, the best way to check your device for viruses is to use a dedicated antivirus for Windows.

Download Bitdefender Free Antivirus for Windows and benefit from real time protection for your laptop or PC. This free antivirus includes a powerful virus scanner which instantly detects and blocks viruses and e-threats on your Windows devices. If you need to make sure that your device is safe, the virus cleaner module will keep any threat at distance at all times.

How do I switch from the previous free product to the new Bitdefender Antivirus Free for Windows?

You can easily install the new Bitdefender Antivirus Free for Windows. Download and run the installation file, as the installation process will be seamless. Don’t worry, we will guide you through every step. 

How does Bitdefender Antivirus Free for Windows protect me against viruses and cyber threats?

Bitdefender Antivirus Free for Windows uses the same Bitdefender technologies considered the best in the industry, as proven by the last decade of independent test scores.

Easy to install and use, Bitdefender Antivirus Free reacts instantly to cyber threats with no compromise to your computer’s performance.

What type of devices and operating systems does Bitdefender Antivirus Free cover?

Bitdefender Antivirus Free is a free antivirus software especially designed to protect your Windows PC. Quick to install and light on computer resources, it is good for gaming, image and video editing, and resource-intensive applications.

Why do I need Bitdefender Antivirus Free on Windows 11?

Windows 11 lets you run the antivirus program of your choosing, and Bitdefender Antivirus Free for Windows is the perfectly optimized option if you need a powerful antivirus software loaded only with the bare-bones protection features that every computer needs.

How does Bitdefender Antivirus Free for Windows compare to other Bitdefender security products?

Bitdefender Antivirus Free for Windows is a free antivirus software especially designed to protect Windows computers.

Need protection on more operating systems? Bitdefender Total Security offers cross-platform protection that covers Windows PCs, Macs, smartphones and tablets running Android or iOS for up to 10 devices. Bitdefender Total Security also includes a basic VPN with up to 200 MB per day of encrypted traffic for your devices.

Need unlimited VPN traffic? Bitdefender Premium Security includes Bitdefender Total Security, Bitdefender Premium VPN for Unlimited Traffic & Premium Support.

Do I get a VPN with my Bitdefender Antivirus Free download?

No, Bitdefender Antivirus Free for Windows does not include the VPN service that comes with other Bitdefender products.

If you need a secure VPN, Bitdefender Total Security comes with a basic version of Bitdefender VPN that includes a generous amount of traffic (6 GB monthly), free of charge.

If you need unlimited traffic, add Bitdefender Premium VPN to your Bitdefender subscription.

I changed my computer. How do I reinstall Bitdefender Antivirus Free?

Log in to your Bitdefender Central account, go to My Devices and start installing Bitdefender on your new device.

Didn't find what you were looking for?

Log in to your Bitdefender account at Bitdefender Central to find out more about your Bitdefender products (video tutorials included).

Helpful articles are also available in Bitdefender Support Center.