Hi Viktor,
Yes, your activation key will be retained when you upgrade from Windows 10 Pro to Windows 11 Pro especially since your system shows it's activated with a digital license linked to your Microsoft account. That means your license is tied to your device and account, not just a product key.
You can upgrade through Windows Update (Update Center) for a smooth transition. It will keep your files, apps, and settings, and your activation will carry over automatically.
If you choose to do a clean reinstall, just make sure to sign in with the same Microsoft account during setup. Windows will detect your hardware and reapply the digital license.
As for availability, Microsoft hasn’t announced an exact end date for the free upgrade offer, but since support for Windows 10 ends on October 14, 2025, it’s best to upgrade soon.
Best,
Jeric