Acronis True Image 2021 uses a serial number to unlock the software's backup and cybersecurity features, with the specific activation method depending on whether you have a perpetual or subscription license. How to Find Your Serial Number
Depending on how you purchased the software, you can locate your serial number in several ways:
Acronis Account Portal: Log in to your Acronis Account and navigate to the Products section. Registered serial numbers are listed there, though subscription keys are often hidden as they are tied directly to your login.
Purchase Email: If bought online, search your inbox for "Acronis," "Cleverbridge," or "DigitalRiver" to find your confirmation email.
Retail Packaging: For boxed products, the sticker is typically found on the CD sleeve or inside the DVD case. acronis true image 2021 serial number
Windows Registry: If already installed, the key may be stored in the Registry under standard, enterprise, or key values. Activation Process
Activation must be completed within 30 days of installation to avoid losing access to all features except data recovery. Open Acronis True Image 2021.
Go to the Account Tab: If you have a subscription, simply Sign In with your email and password; the license will activate automatically.
Enter Serial Number: For perpetual licenses, click Enter serial number, paste your 64-character key, and click Activate. Acronis True Image 2021 uses a serial number
Upgrade Keys: If you have an upgrade license, you will also be prompted to enter the serial number of a previous version (e.g., 2019 or 2020) to complete the process. 65513:Acronis True Image 2021: Licensing and Upgrade FAQ
Acronis True Image 2021 operates on a licensing model. When you download the software, you typically get a free trial version with limited functionality or a time limit. To unlock features like:
You must activate the product with a valid, unique serial number.
Once you have your legitimate key, activation is simple: Why You Need a Valid Serial Number Acronis
If you are connected to the internet, the software will verify the key and unlock all features immediately.
If you actually bought Acronis True Image 2021 but misplaced the key, don’t panic. Here’s how to recover it:
account.acronis.com → “Products” → “View serial numbers.”As of 2025, Acronis True Image 2021 is considered a legacy version (end of mainstream support). It still works on Windows 10 and 11, but no new features are added, and critical security patches may be limited. The company now promotes Acronis Cyber Protect Home Office (versions 2023–2025).
If you need ongoing support and cloud backup, a subscription to the current version is safer. But if you prefer a perpetual license and only need local backup, a genuine 2021 license can still serve you well for years.
Acronis frequently releases updates to combat new ransomware strains and improve compatibility with the latest Windows updates. A software version activated with a blacklisted key will not be able to download these essential patches.
Software piracy is a violation of copyright law. While individuals are rarely pursued for small-scale use, businesses can face substantial fines. Acronis also includes audit capabilities in its business editions.