Error 0xc004e016 while Changing Product Key in Win 10


Many people are upgrading their computers to Windows 10. The error pop ups while trying to activate Windows 10 or change its Product Key.

Download Diagnostic

You’re just 3 steps away from fixing this problem…

1. Download and install the Diagnostic

2. Run full scan

3. Perform system clean-up & repair

Estimated download time: 10 Seconds


Use Command-line Arguments

You may have to follow these command-lines:

1. Open Command Prompt (Admin). Press Windows Key + X; and select that option.


2. Execute below command-lines

  • slmgr /upk
  • slmgr.vbs /cpky
  • slmgr /ckms
  • slmgr.vbs /ckms
  • slmgr /skms localhost


3. Restart the PC after executing these commands.

Perform Activation by Phone

Phone activation works when Microsoft servers fail to change product keys.

1. By pressing Windows Key + R and opening Run dialog, type “slui.exe 4” and click OK.


2. Go for “Phone Activation” option when you’re prompted to do so.

Download Windows Updates

Microsoft may have released new patches for error 0xc004e016. Go to Windows Update and check for new updates.

1. Open Start Menu, click Settings.


2. In the new page, click Update & Security icon.


Try Activation Command-lines

There are other SLMGR command-lines where you need to insert your Windows 10 Product Key. The activation should work.

1. Open Command Prompt (Admin).

2. Execute below command:

  • slmgr /ipk AAAAA-AAAAA-AAAAA-AAAAA-AAAAA (Replace it with your Product Key)
  • slmgr /skms
  • slmgr /ato
  • Exit

3. Restart your PC for the changes to take effects.

Free Up 10s of GBs of Disk Space!

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