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Built by Bitdefender Award-Winning Leader in Cybersecurity

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

The digital Stone Age of easy-to-spot viruses is over. 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 Windows keeps you safe, even against today’s constantly changing e-threats

By learning & 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’re shielded from known and emerging threats, including …

Ransomware

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

Cryptojacking

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 without fear with Bitdefender Antivirus Free for Windows

Choose the free antivirus software that’s as undetectable as it is effective

 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 antivirus products that constantly pester you for permission, Bitdefender gently notifies you about threats, then gets right out of your way.

• 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 hurting performance.

• Won’t bloat or 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 WANT to see them.

And if you want encrypted privacy on top of a clean PC

You’re in luck: Bitdefender Antivirus Plus and Total Security come 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.

Compare Bitdefender Products

Compare our award-wining products and get the best real-world protection, so you can keep doing the things that matter while we handle security.

Bitdefender Antivirus Free

Bitdefender Antivirus Plus

Your total price:

$ for the first year.

Bitdefender Total Security

Your total price:

$ for the first year.

Windows Protection

Top-notch protection and uncompromising speed for Windows.

Improved

Complete Real-Time Data Protection

Absolute power in the most efficient anti-malware solution available today. Automatic protection that goes beyond antivirus.

Advanced Threat Defense

Our improved behavior-based technology detects and blocks advanced threats and ransomware.

Web attack prevention

Our web filtering technology ensures that you never land on a harmful website.

Anti-Phishing & Anti-Fraud

Prevents phishing or online fraud when you shop, bank, or browse.

Bitdefender Photon™

This innovative, exclusive technology helps Bitdefender adapt to the hardware and software configuration of your system to save computing resources and improve speed and performance.

Global Protective Network

Most heavy scanning takes place in the cloud, this means your system’s speed and performance remain unaffected. Your files remain completely private: Bitdefender does not scan the actual contents of your files, and never uploads or stores them in the cloud.

Network Threat Prevention

The new cyber threat intelligence technologies included can analyze and identify suspicious network-level activities, and block sophisticated exploits, malware or botnet-related URLs, and brute force attacks.

Multi-Layer Ransomware Protection

Multiple layers of ransomware protection keep your files safe from encryption.

Improved

Vulnerability Assessment

Scan for security holes and vulnerabilities with just one click.

Rescue Environment

Some sophisticated malware, like rootkits, need to be removed before Windows starts. When Bitdefender detects such threats, it reboots the computer in Rescue Environment for clean-up and restoration.

Autopilot

Our latest Autopilot is designed to act as a ‹Security Advisor› and to give you deeper insights into your security posture. Its smart capabilities mean that it can recommend security actions in the context of your system needs and usage patterns.

Game, Movie & Work Profiles

Bitdefender detects when you play, work or watch a movie, so it knows not to bother you with unnecessary requests. It temporarily halts pop-ups, adjusts visual settings, and pauses unimportant background activities to allow you to enjoy your device to the max.

Battery Mode

This useful, intelligent feature saves battery life for laptops and tablets by temporarily tweaking system settings such as display, system cooling, system updates and Bluetooth connectivity.

Improved

Bitdefender VPN

Protects your online presence by encrypting all Internet traffic. 200 MB daily traffic included per device.

Anti-tracker

Keeps your browsing private and allows you to manage trackers that collect your data.

Safe Online Banking

Bank and shop with Safepay, our unique, dedicated browser that secures your transactions.

Wi-Fi Security Advisor

Access your Wi-Fi network and router security, no matter where you connect from.

Social Network Protection

Stay safe from malicious links and any online threats your friends unwittingly pass on to you via social networks.

Password Manager

Secures your passwords, credit card information, and other sensitive data in a cyber-vault for easy access whenever you need them.

File Shredder

Delete a file for good and leave no traces that it ever existed on your PC.

Microphone Monitor

Helps you regain control over your own devices. Use it and you’ll be able to see what apps have access to your device’s microphone and when.

Webcam Protection

Notifies you when apps try to access your webcam, and lets you block unauthorized access.

Antispam

Filters irrelevant messages in your Inbox. It’s available for local email clients (Microsoft Outlook, Thunderbird).

Parental Control

Offers digital help to parents and extra online safety to children. Log in remotely to Bitdefender Central to keep up with them.

Privacy Firewall

Blocks intrusions and filter your network traffic.

Speed Up Your Devices

Improves speed and performance for your devices with OneClick Optimizer.

Anti-Theft

Packs effective anti-loss and anti-theft tools and it is remotely accessible.

macOS Protection

Absolute protection, designed for your Mac.

Safe Files

Prevents unauthorized changes to your most important files.

Time Machine Protection

With this complex feature, you can restore the files from your Mac without having to pay ransom. Time Machine Protection gives you the edge against malware that may attempt to encrypt or destroy your backups.

Adware Blocker

Free your Mac from adware, hijacker programs, unwanted toolbars, and other browser add-ons.

Cross-Platform Malware Detection

Detects and removes both malware targeting macOS and threats made for Windows, so you are always sure the files you send to others are clean.

Traffic Light (browser extension)

Protects all your browsing, including your online shopping and banking, and can filter out inappropriate content.

Anti-Phishing

Bitdefender sniffs and blocks websites that masquerade as trustworthy in order to steal financial data such as passwords or credit card numbers.

Bitdefender Shield

Combines a series of innovative proprietary technologies to automatically detect and remove any threat, with no negative impact on your Mac’s speed and performance.

Autopilot

Our latest Autopilot is designed to act as a Security Advisor and to give you deeper insights into your security posture. Its smart capabilities mean that it can recommend security actions in the context of your system needs and usage patterns.

24/7 Cloud-Based Guard Duty

We use amazingly powerful Cloud-based technologies to detect and eliminate e-threats, to give you instant worldwide protection, with no drag on your Mac’s resources.

Ultra-Fast Scanning

Scanning is fast and light on resources, so there's no negative impact on your Mac’s speed and performance.

Improved

Bitdefender VPN

Protects your online presence by encrypting all Internet traffic. 200 MB daily traffic included per device.

Anti-tracker

Keeps your browsing private and allows you to manage trackers that collect your data.

Android Protection

Award-winning security for your Android phone or tablet.

On-Demand & On-Install Scan

Scans your Android devices to make sure that your apps are clean. It immediately lets you know if a newly installed app poses any danger.

Web Protection

Notifies you about webpages that contain malware, phishing, or fraudulent content.

WearON

Extend Bitdefender security to your connected smart watch.

Anti-Theft

Locate, lock, wipe or remotely send a message to your Android device.

Autopilot

Our latest Autopilot is designed to act as a ‹Security Advisor› and to give you deeper insights into your security posture. Its smart capabilities mean that it can recommend security actions in the context of your system needs and usage patterns.

Battery & Performance Saver

Secures your mobile experience with virtually no impact on speed or battery life.

Fast & Light-Weight

Bitdefender is amazingly powerful against malware, yet easy on your phone’s resources, so you won’t see any negative impact on performance.

Improved

Bitdefender VPN

Protects your online presence by encrypting all Internet traffic. 200 MB daily traffic included per device.

App Lock

Protects your sensitive apps from unauthorized access with a PIN code or your fingerprint.

Account Privacy

Check if your online accounts have been involved in any data breach. Account Privacy notifies you when your sensitive data is at risk, and lets you take action depending on its status.

iOS Protection

Protect your data and keep your iPhone or iPad safe.

Improved

Bitdefender VPN

Protects your online presence by encrypting all Internet traffic. 200 MB daily traffic included per device.

Account Privacy

Check if your online accounts have been involved in any data breach. Account Privacy notifies you when your sensitive data is at risk, and lets you take action depending on its status.

Automatic Upgrades

Every Bitdefender product is designed to update automatically, and protect you against the most advanced cyber threats on the planet. Upgrades to the latest version are included as part of your subscription. This way, you’ll never miss out on new and improved features, even if you’re halfway through your subscription period.

Free Online Support

Our support center is up all year long.

Thank you for downloading Premium Security

If the download doesn’t start automatically, please click here to download your trial. After the download has finished you can find the installer in your browser’s Downloads folder.

Get Started with Bitdefender in 3 easy steps:

1.Double-click the downloaded Bitdefender file and the installer will start immediately.

2.Sign in to activate your Bitdefender protection

3.Enjoy the peace of mind of being protected by Bitdefender.

Browse, click and download without fear with Bitdefender Antivirus Free for Windows

System Requirements

Select

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

Bitdefender Antivirus Free for Windows

SYSTEM REQUIREMENTS

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

SOFTWARE REQUIREMENTS

Internet Explorer version 11

FREQUENTLY ASKED QUESTIONS

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.

Terms of use

Auto renewal terms

• Your subscription automatically begins at the purchase date;
• By subscribing, you are purchasing a recurring subscription which will automatically renew;
• The Bitdefender Auto Renewal Plan is designed to save you time, effort, and minimize your vulnerability risk by extending your subscription automatically before you run out of protection.

Here is what the Bitdefender Auto Renewal Plan means for you

• Continuous protection so that you never have to worry about your subscription running out before you renew manually;
• Free upgrades whenever a new version of Bitdefender comes out;
• Peace of mind that your devices are always protected;
• Save time while we are taking care of the automatic renewal process;
• Opt out at any time so that you are always in control of your renewal options;
• 24/7 security all-subscription long without interruption;
• The price offered is valid for the first year of subscription. After that, your subscription will be billed at the applicable renewal price which may be higher than the initial purchase price;
• If a discount is presented, it describes the difference between the first term and renewal term subscription prices (e.g., first year price vs. each year thereafter). The prices are subject to change, but Bitdefender will send a prior notification by email, before the automatic renewal takes place. You will receive an email notification before you will be billed, along with information regarding pricing and the extension of your subscription duration.

Affirmative consent

• Your subscription automatically begins at the purchase date;
• By subscribing, you are purchasing a recurring subscription which will automatically renew.

How to cancel + email address cancelation support

• You may cancel your automatically subscription from Bitdefender Central or by contacting Customer Support at: ;
• You may obtain a refund by contacting  within 30 days of your initial purchase or of the automatic renewal date.