After buying a security suite you receive an activation key by email. Turning that into full protection takes about five minutes. The exact menus differ slightly between Bitdefender, Kaspersky and ESET, but the flow is the same. Here is the universal step-by-step.
Install & activate antivirus – step by step
After buying a security suite you receive an activation key by email. Turning that into full protection takes about five minutes. The exact menus differ slightly between Bitdefender, Kaspersky and ESET, but the flow is the same. Here is the universal step-by-step.
Step-by-step installation
Create or sign in to the vendor account: open the vendor's site (Bitdefender Central, My Kaspersky or ESET HOME) and sign in with — or create — an account using your order email.
Redeem your activation key: in the account dashboard choose "Activate / Add a subscription" and paste your 25-character key. The licence is now linked to your account.
Download the installer: from the same dashboard download the installer for your platform (Windows, macOS, Android or iOS).
Run the installer: open the downloaded file and follow the wizard. It removes incompatible software, downloads the latest engine and installs the suite.
Activate and run the first scan: the app picks up your linked licence automatically. Confirm activation, let it update its definitions and start a first full scan.
Verify you are protected
The dashboard shows a green "Protected" status and a valid licence end date.
Real-time protection, web protection and the firewall are switched on.
Microsoft Defender's real-time protection has switched itself off automatically (this is correct — only one engine should run).
Turn on the extras
Do not forget the tools your licence includes: enable ransomware shielding, set up the password manager and switch on the VPN. These are exactly the layers that make a paid suite worth it.
Need a genuine 2026 licence with instant key delivery? Pick your suite:
At KeyVano you can buy genuine software licenses across the DACH region: Germany, Austria and Switzerland. The licenses are valid internationally and are not tied to any country – you get the same prices, the same instant delivery by email and the same support everywhere. Whether you order from Vienna, Zurich, Berlin or anywhere else, the process is identical and free of country-specific restrictions.
Frequently asked questions
How long does antivirus installation take?
About five minutes: redeem the key in the vendor account, download the installer, run it and let the first scan start. Multi-device setups take a couple of extra minutes per device.
Do I need to uninstall my old antivirus first?
Yes. Running two real-time antivirus engines causes conflicts and slowdowns. Uninstall the old product before installing the new one. Microsoft Defender switches itself off automatically and does not need uninstalling.
Where do I enter my activation key?
In the vendor's account dashboard — Bitdefender Central, My Kaspersky or ESET HOME — under "Activate" or "Add a subscription". The licence then links to your account and the app activates automatically.
Can I install one licence on several devices?
If your licence covers multiple devices, yes. Sign in to the same account on each device, download the matching installer and activate — all devices appear under one dashboard.
Can I order from Austria or Switzerland too?
Yes. KeyVano delivers software licenses to Germany, Austria and Switzerland. Delivery is instant by email everywhere, prices are the same for all countries, and the license keys work worldwide without regional locks.
Step by step
Sign in to the vendor account: Open the vendor's site (Bitdefender Central, My Kaspersky or ESET HOME) and sign in with your order email, or create an account.
Redeem your activation key: In the account dashboard choose "Activate / Add a subscription" and paste your 25-character key to link the licence to your account.
Download the installer: From the same dashboard download the installer for your platform (Windows, macOS, Android or iOS).
Run the installer: Open the downloaded file and follow the wizard; it removes incompatible software, downloads the latest engine and installs the suite.
Activate and run the first scan: The app picks up your linked licence automatically. Confirm activation, update the definitions and start a first full scan.