Hi Sir. Goodie, thanks for reaching out. Windows activation issues can be frustrating, but I’ll walk you through the best steps to get your Dell Latitude E7450 properly activated.
First, check your activation status by going to Settings > System > Activation. If it says Windows isn’t activated or shows an error, try selecting Change product key and re-entering your 25-character key if you have one. If that doesn’t work, it’s possible the key isn’t valid for Windows 11 Pro especially if the device originally came with Windows 7 or 10 Pro.
Second, if your PC was upgraded manually to Windows 11 Pro, you’ll need a valid license. You can purchase one directly from the Microsoft Store by clicking Open Store in the Activation settings. If your device was previously activated with Windows 10 Pro, and you’re signed in with your Microsoft account, it may activate automatically using a digital license.
Last, I recommend checking your device’s original license with Dell Support using your Service Tag. They can confirm whether your PC came with a Windows license and help you recover it if needed.
If this helps, feel free to mark the answer as accepted so others can find it too.
Best,
Carl