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About this licence
Bitdefender Internet Security – 1-Year Protection for Your Digital Life
In an era where digital threats evolve by the minute, relying on basic, built-in security is a gamble you cannot afford. Bitdefender Internet Security for 1 device provides a comprehensive, multi-layered defence system that goes far beyond simple antivirus. This is not just a piece of software; it is a 1-year digital shield for your Windows PC, designed to protect your finances, your identity, and your personal files from the entire spectrum of online threats. From ransomware that could lock you out of precious family photos to sophisticated phishing scams designed to steal your banking credentials, this solution offers absolute peace of mind.
This 1-year digital license is ideal for home users who demand the best protection for their primary computer, freelancers managing sensitive client data, or small business owners who need a robust, compliance-ready security solution for a single workstation. The core benefit is autonomy: a powerful, intelligent security suite that works silently in the background, blocking threats in real-time without slowing down your system. With Lizensa, you receive a genuine, EU-compliant license delivered instantly, backed by professional support and a clear VAT invoice, making it a perfect choice for both private and professional use.
Key features and benefits
Advanced Threat Defence with Behavioural Detection: Unlike signature-based antivirus that only catches known viruses, Bitdefender monitors active processes in real-time. If an application suddenly starts behaving like ransomware—encrypting files without permission—it is instantly blocked, protecting you from zero-day exploits and brand-new malware that haven't even been catalogued yet.
Dedicated Online Banking and Shopping Protection: A unique, hardened browser environment automatically opens for your financial transactions. This feature secures your connection, blocks keyloggers from capturing your credit card details, and prevents screen-grabbing malware, ensuring your payments are invisible to prying eyes.
Real-Time Anti-Phishing and Anti-Fraud: Advanced heuristics scan every URL you click against a constantly updated cloud database. If a website is a verified scam or a perfect clone of your bank's login page, the connection is severed before you can accidentally enter your credentials, keeping your identity safe.
Intelligent Bidirectional Firewall: This goes beyond the basic Windows firewall by monitoring both incoming and outgoing traffic. It detects stealthy intrusion attempts and, crucially, alerts you if a malicious program on your PC is trying to "phone home" with your personal data, giving you full control over your network connections.
Multi-Layer Ransomware Remediation: Even if a ransomware strain bypasses the first line of defence and begins encrypting documents, Bitdefender automatically creates copies of targeted files in a protected cache. It can then restore the original, unencrypted versions, neutralising the attack and saving your data without paying a ransom.
What you get
Digital delivery after purchase
License details and activation instructions included
Suitable for private or business use where the product terms allow
Lizensa support for installation and activation questions
Device-count and duration variants
Security software subscription license
Specifications
Operating system
Windows
Version
Latest
SKU
LZP-0511
Licence
Perpetual / lifetime
Architecture
x64
Languages
From order to activation
01Order received
02Key verified
03Email delivered
04You activate
Common questions
What are the system requirements for Bitdefender Internet Security 1 device 1 device 1 year?
Bitdefender Internet Security 1 device 1 device 1 year requires Windows 10/11, at least 4 GB of RAM (though 8 GB is recommended), and 2 GB of free storage space. An internet connection is needed for download and activation.
What kind of license do I get with Bitdefender Internet Security 1 device 1 device 1 year from Lizensa?
Your Bitdefender Internet Security 1 device 1 device 1 year license is a perpetual (lifetime) license — buy once and use forever on one device. This means no recurring fees or subscriptions. You'll also receive free updates and security patches from Lizensa.
What's included with my Bitdefender Internet Security 1 device 1 device 1 year purchase from Lizensa?
Your purchase includes a genuine Bitdefender Internet Security 1 device 1 device 1 year license key, a download link from the official Bitdefender website, step-by-step activation instructions, a VAT invoice (EU), and lifetime access to the key in your Lizensa account. All keys are authentic and backed by our 14-day money-back guarantee.
Why is Bitdefender Internet Security 1 device 1 device 1 year so much cheaper on Lizensa?
At just €19.90, our Bitdefender Internet Security 1 device 1 device 1 year license is up to 86% cheaper than retail because we buy in wholesale volume from European distribution channels and pass the savings directly to you. You get the exact same genuine product — just without the retail markup.
How do I install and activate Bitdefender Internet Security 1 device 1 device 1 year from Lizensa?
After purchase, you'll receive a download link and license key by email. Download the software from the official Bitdefender website, enter your key during installation or in the activation menu, and follow the guided setup. Full instructions are included with your purchase.
Is Bitdefender Internet Security 1 device 1 device 1 year compatible with my operating system?
Bitdefender Internet Security 1 device 1 device 1 year is compatible with current versions of Windows and macOS. Please check the system requirements section on this page before purchasing. Most modern PCs and Macs meet or exceed the minimum requirements.
How quickly will I receive my license key from Lizensa?
Your license key is delivered instantly via email after payment is confirmed — typically within 30 seconds. You'll also find it in your Lizensa account dashboard under My Library.
Are Lizensa license keys genuine and legal in the EU?
Yes. Our licenses are sourced through European distribution channels and come with a VAT invoice. The EU Court of Justice (UsedSoft v Oracle, C-128/11) has confirmed that software license resale is legal within the European Economic Area.
What is Lizensa's refund policy?
We offer a 14-day money-back guarantee on all licenses. If you encounter any issues with activation or the product doesn't meet your needs, contact our support team for a full refund — no questions asked.
productDetail.faq.activation.question
After purchase, you'll receive an email with your license key and step-by-step activation instructions. Simply enter the key during installation or in your system's activation settings. Most activations take under 2 minutes.
Do I get support with my Lizensa purchase?
Absolutely. Our multilingual support team responds within one hour during business hours. We can assist with installation, activation troubleshooting, and license questions via email in English, German, French, Spanish, Italian, Dutch, and Polish.
Is this licence lawfully resold in the EU?
Yes. Sourced through authorized European distribution channels. Every key is genuine and resaleable under EU “exhaustion of rights” (CJEU C-128/11).
How fast does the key arrive?
Average delivery is 43 seconds. We commit to under 60 seconds. If we miss that, you get a free replacement.
Can I get a refund if it doesn’t work for me?
Yes. EU consumer law gives you 14 days to return any unused key — no fees, no questions. Honoured without friction.
Do you provide a VAT invoice for B2B?
Yes. EU-compliant invoice with every order, downloadable from your dashboard. Valid VAT number triggers automatic reverse-charge.
What languages is the activation guide in?
EN, DE, FR, ES, NL, PL, IT, PT — matched automatically to your account locale.
What if I have trouble activating?
Email or chat support replies in your language within an hour during EU business hours. We’ll walk you through it or replace the key.
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Unified Security Dashboard: Manage your entire security posture from a single, intuitive interface. Run quick or full system scans, check for software vulnerabilities, and manage your subscription status without navigating through complex menus, making advanced security accessible to everyone.
Automatic Performance Profiles: The software intelligently adapts to your activity. It detects when you are gaming, working, or watching a movie and automatically postpones background scans and non-critical alerts, ensuring your system resources are dedicated to your experience, not to system maintenance.
Wi-Fi Security Advisor: Whenever you connect to a new wireless network, the module analyses its security configuration. It instantly warns you about weak passwords, vulnerable encryption protocols (like WEP), or potential man-in-the-middle attacks on public hotspots, securing your connection wherever you work.
What's included with your purchase
When you purchase this product from Lizensa, you are acquiring a genuine, 1-year subscription license for Bitdefender Internet Security, covering exactly 1 Windows device. This is a digital delivery item; no physical box or USB stick will be shipped. Within minutes of completing your order, you will receive an email containing your unique activation code and a direct link to the official Bitdefender download portal. Your purchase also includes a full EU-compliant VAT invoice, suitable for business accounting and tax purposes.
This is a term-based subscription license, valid for 365 days from the date of activation. It is not a lifetime or perpetual license. Activation is straightforward: download the installer, run it, and enter the provided code when prompted. The license is tied to your Bitdefender Central account, which allows you to manage your subscription, monitor your device's security status remotely, and download the software again if needed. The software interface and support are available in multiple languages, including English, German, French, Dutch, and Polish.
Protection coverage: what you get
This license secures a single Windows PC for a full year, providing an essential layer of digital armour that free or built-in alternatives simply cannot match. While Microsoft Defender has improved, it lacks the dedicated anti-fraud, ransomware remediation, and network intrusion detection layers that define a premium internet security suite. With Bitdefender, you are not just getting a virus scanner; you are getting a complete ecosystem designed to protect your digital identity.
Device Coverage: 1 Windows PC.
License Duration: 1 year (365 days).
Core Protection: Antivirus, anti-spyware, anti-ransomware, and anti-rootkit engines.
Network Defence: Intelligent firewall, Wi-Fi security advisor, and anti-botnet technology.
Privacy Shield: Webcam protection, microphone monitor, and anti-tracker to stop advertisers from profiling you.
Transaction Security: Safepay hardened browser for banking and shopping.
Vulnerability Assessment: Automatic scans that check for outdated software, missing Windows patches, and weak system passwords that could be exploited by hackers.
System requirements / compatibility
Bitdefender Internet Security is engineered for the Windows platform, supporting both 32-bit and 64-bit architectures where the specific product edition allows. To ensure a smooth and responsive experience, your system should meet the following minimum specifications. For optimal performance, especially during full system scans, the recommended specifications are advised.
Operating System: Windows (32-bit and 64-bit editions supported).
Minimum RAM: 2 GB.
Recommended RAM: 4 GB.
Minimum Storage: 2 GB of free hard disk space.
Internet Connection: Required for initial activation, product updates, and real-time cloud-based threat detection.
Note: Exact system requirements can vary slightly between product versions. We strongly recommend validating these specifications against the official Bitdefender documentation for your specific Windows build before activating your product.
Installation and activation
Getting started with your new security suite is a rapid, three-step process designed for immediate protection. The moment your payment is processed by our secure system, Lizensa initiates the digital delivery of your license.
Instant Delivery: Your unique activation code and a download link are delivered to your email inbox and made available in your Lizensa customer account. This typically happens in under 60 seconds.
Download and Install: Click the provided link to download the official installer from Bitdefender's servers. Run the file and follow the on-screen prompts. The installer will guide you through the initial setup.
Activate Your Protection: When prompted, enter the license key you received from Lizensa. The software will connect to Bitdefender's activation servers to validate your 1-year subscription. Once confirmed, your protection is live.
Should you need to reinstall Windows or move the license to a new PC, you can do so by uninstalling the software from the old machine and installing it on the new one using the same activation code, managed through your Bitdefender Central account. If you encounter any activation errors, Lizensa's free multilingual technical support team is ready to assist you.
Why choose Lizensa for your software licenses
Choosing where to buy your software license is as crucial as choosing the software itself. At Lizensa, we have built our reputation on being a trusted, transparent, and customer-first European retailer. When you purchase your Bitdefender Internet Security license from us, you are not just buying a key; you are investing in a relationship backed by concrete guarantees. Our entire process is built for speed and security. The average delivery time for a digital license is under 60 seconds, meaning you can go from purchase to protected in minutes. We process payments exclusively through Stripe, a global leader in secure online transactions, allowing you to pay with confidence using SEPA, iDEAL, BLIK, Google Pay, and major credit cards.
Every license we sell is 100% genuine and sourced directly from authorised European distribution channels. This guarantees that your software is legitimate, fully functional, and compliant with all EU regulations. As a European customer, you are protected by the full weight of EU consumer law, including a 14-day right of withdrawal. We provide a full, compliant VAT invoice with every purchase, which is essential for business accounting and enables the reverse-charge mechanism for eligible B2B cross-border transactions within the EU. Our commitment to you extends beyond the sale. If you face any technical hurdle during installation or activation, our free, multilingual support team is here to help, ensuring your license works perfectly across all 27 EU member states.
FAQ — frequently asked questions
Is this a subscription or a one-time purchase?
This is a 1-year subscription license. Your protection is active for 365 days from the date of activation. To continue using the software and receiving security updates after the first year, you will need to purchase a renewal.
How fast do I get my license key after payment?
Digital delivery is virtually instant. Our system is automated to send your activation code and download instructions to your email address and Lizensa customer account within an average of 60 seconds after payment confirmation.
Is this a genuine, legal license for use in the EU?
Absolutely. Lizensa supplies only 100% genuine licenses sourced from authorised European distributors. This license is fully legal for activation and use in all 27 EU member states and comes with a VAT invoice for your records.
What if I have trouble activating the software?
We provide free multilingual technical support. If you encounter an error during activation, simply contact our support team with your order details, and we will guide you through the process to ensure your software is up and running.
Can I reinstall this license on a new computer?
Yes. The license is managed through your Bitdefender Central account. If you get a new PC or need to reinstall Windows, simply uninstall the software from the old device and install it on the new one using your existing activation code.
Does this work on Mac or Android devices?
No, this specific license is for 1 Windows device. Bitdefender Internet Security is a Windows-based product. For cross-platform protection, you would need a product like Bitdefender Total Security, which covers multiple operating systems.
What payment methods does Lizensa accept?
Our Stripe-secured checkout accepts a wide range of payment methods, including major credit cards, SEPA bank transfers, iDEAL, BLIK, and Google Pay, ensuring a secure and convenient transaction.
Do you provide a VAT invoice for business purchases?
Yes, a full EU-compliant VAT invoice is provided with every purchase. For B2B customers with a valid VAT ID, the reverse-charge mechanism can be applied, making it simple for business accounting and compliance.
What is your refund policy?
As an EU-based retailer, we adhere to EU consumer protection laws, which grant you a 14-day right of withdrawal on your purchase. Please refer to our terms and conditions for full details on how to exercise this right.
How does this compare to the free Windows Defender?
While Windows Defender provides basic antivirus protection, Bitdefender Internet Security adds multiple critical layers including a dedicated firewall, anti-ransomware remediation, a secure browser for banking, webcam protection, and a Wi-Fi security advisor. It offers a far more comprehensive defence against modern threats.
Is an internet connection required to use the software?
An internet connection is required for initial activation and to receive real-time threat intelligence and product updates. While core on-access scanning works offline, full protection relies on cloud connectivity to detect the very latest threats.
What is the difference between Internet Security and Total Security?
Bitdefender Internet Security provides premium protection for Windows PCs, focusing on online threats, ransomware, and privacy. Bitdefender Total Security extends this same level of protection to multiple platforms, including macOS, Android, and iOS, and often includes system optimisation tools.
