Fix 0xC004B100 Error: The activation server determined that the computer could not be activated

RECOMMENDED: Click here to fix Windows errors and optimize system performance

Windows 10 Activation Error Code 0xc004b100 is the occurrence of an error in Windows 10 when updating or activating is quite common. Even incorrect configuration of system files in the Windows operating system can lead to an error and the error code 0xc004b100 is such a problem. This error has often worried people and if you are one of these people, then the Windows 10 activation error code 0xc004b100 must be fixed immediately. Windows 10 is used by millions of people across the country, and there are occasional problems with its use.

windows 10 Activation Error Code 0xc004b100

When you try to use a MAK to activate one or more computers, you may receive the following error message:

0xC004B100 The activation server determined that the computer could not be activated.

To solve this problem, use one of the following methods.

Use the command prompt


    1. In the Start Search box, type the command prompt, right-click Command Prompt, and then click Run as Administrator.
    2. In the Administrator: command prompt, type a command that looks like the following, then press ENTER:
      cscript c:\windows\system32\slmgr.vbs -ipk {ProductKey}
      Note If your organization uses a KMS key instead of a MAK key, use the generic KMS key included in the Pid.txt file. This file is located in the \sources folder of the Windows Vista installation DVD.

April 2019 Update:

We now recommend using this tool for your error. Additionally, this tool fixes common computer errors, protects you against file loss, malware, hardware failures and optimizes your PC for maximum performance. You can fix your PC problems quickly and prevent others from happening with this software:

  • Step 1 : Download PC Repair & Optimizer Tool (Windows 10, 8, 7, XP, Vista – Microsoft Gold Certified).
  • Step 2 : Click “Start Scan” to find Windows registry issues that could be causing PC problems.
  • Step 3 : Click “Repair All” to fix all issues.


  1. Enter a command similar to the one below, then press ENTER:
    cscript c:\windows\system32\slmgr.vbs -ato

Manual update


  1. Log in to your computer as an administrator.
  2. You must now click on the Start button.
  3. Select All Programs, then Accessories, System Tools, then click Restore System.
  4. Open a new window and select the option “Restore computer at an earlier time”, then click on Next.
  5. Select the most recent system from the “In this list, click on a restore point” list, then click on Next.
  6. Click on Next in the configuration window.
  7. Once the restoration is complete, you can restart your computer.

Add Net Local Group

Add Net Local Group

If you cannot update Windows immediately, you can use this procedure as a workaround. Note that this only works if you are a member of the Local Administrators group.

Enter the prompt in the search.

In the search results, right-click on Command Prompt and choose Run as administrator.

Copy and paste the following commands into the command prompt by right-clicking and choosing Paste (you cannot use CTRL + V to paste in the Command prompt window). Copy one command after another and press Enter after pasting each command into the command prompt.

net localgroup Administrators add localalservice /add

fsutil resource setautoreset true C:\

netsh int ip ip reset reset reset reset reset resetlog.txt

Thank you for taking the time to read this article, we hope you have found a solution to your update activation problem.

RECOMMENDED: Click here to troubleshoot Windows errors and optimize system performance