That particular activation error can arise because of a firewall blocking connectivity with Microsoft’s activation server. As a result, users can’t activate Windows 11 with their product keys when that error arises. Unfortunately, even Windows 10 users have been plagued by the same issue in the past, so being prepared to deal with this issue can make a huge difference.

Do I need to activate Windows 11?

It’s not essential to activate Windows 11 to continue utilizing it. However, there are some restrictions applied when Windows 11 hasn’t been activated. You’ll notice an Activate Windows watermark on the desktop and regular activation notifications for one thing. The most notable restriction is that Windows 11’s Personalization settings are grayed out when it’s not activated. Therefore, you can’t customize the platform with any of the settings on the Personalization tab. That tab includes options for changing themes, colors, and desktop wallpaper among others. If you’re not bothered about that, however, you don’t need to fix Windows 11 activation error 0x87e10bc6. Nevertheless, you might still be able to fix that error in Windows 11 with some of these potential resolutions.

How can I fix the Windows 11 activation error 0x87e10bc6?

1. Try activating Windows 11 again a few days later

It might just be the case that the activation error 0x87e10bc6 is due to a Microsoft activation server issue. The server could be temporarily down. In which case, you might need to wait a day or two before you can activate Windows 11. If the issue persists after a few days, apply the resolutions below.

2. Run the activation troubleshooter

3. Use a third-party system repair tool

Some third-party system repair tools might provide a solution for activation error 0x87e10bc6. SPONSORED Restoro is among the most comprehensive third-party system repair utility for Windows 11/10. That’s a repair tool that can fix a wide variety of Windows errors. Restoro runs some of the deepest system scans to detect and resolve Windows issues. It has a database repository of more than 25,000,000 files available for replacing missing or corrupted files. Check out our Restoro review for full details about that software. ⇒ Get Restoro

4. Use the Command Prompt

5. Temporarily disable the Windows Defender Firewall

6. Uninstall third-party firewall software

You can also uninstall software and erase all leftover debris with third-party uninstaller tools like IObit Uninstaller. IObit Uninstaller is a freeware software that packs in more options and features for removing software than Windows 11’s default uninstaller applet.

7. Restore your OS to a previous point

Can I activate Windows 11 by phone instead?

There is an offline phone method for activating Windows 11. You can select to activate Windows by phone via Settings as outlined on Microsoft’s Product activation webpage. Alternatively, enter slui.exe 4 in Run’s window and click the OK button. In the Windows Activation window that opens, you’ll need to select a location in the drop-down menu. Then the window will display some toll-free numbers to call for activating Windows. Note down the numbers needed there to activate the platform offline. However, you shouldn’t need to activate Windows 11 via phone if your PC is connected to the internet. Try applying all the potential resolutions for error 0x87e10bc6 above first. The fixes in our Can’t activate your copy of the Windows 11 guide might also help resolve that issue. You can discuss Windows 11 activation error 0x87e10bc6 in the comments section below. Feel free to add any questions or even share any other error 0x87e10bc6 resolutions there.

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