Fix 0xC004F041: Key Management Server (KMS) isn’t activated.

You might encounter error code 0xC004F041 while activating your Windows using the Key Management Service (KMS). The complete error message is as follows:

Error Message

Error 0xC004F041: The Software Protection Service determined that the Key Management Server (KMS) isn’t activated. KMS needs to be activated.

In this article, we will help you to troubleshoot this error.

How to Fix 0xC004F041 – The Software Protection Service determined that the Key Management Server (KMS) isn’t activated error?

This error typically occurs when the KMS host hasn’t been activated. If the KMS host is disabled, suspended, or not functioning correctly, you are likely to encounter error code 0xC004F041 during the Windows activation process.

Solution 1: Address common PC errors and optimize overall PC health.

The KMS host service might go offline for various reasons, such as misconfigurations in Windows settings, the absence or corruption of essential system files, bugs in Registry files, or the presence of malware, viruses, or trojans. Additionally, if your PC is not optimized and is running on outdated software, you are more likely to encounter the 0xC004F041 error.

To address common PC issues and optimize your computer, you need to use the Outbyte PC Repair Tool.

3 Steps to Fix this Error
Step 1. Download Outbyte PC Repair Tool [File Size: 16.4 MB]
Step 2. SCAN your Windows PC
Step 3. Click Fix button to Repair Error

Solution 2: Activating KMS Host

As previously mentioned, the 0xC004F041 error often arises when the KMS host is disabled. To resolve this, activating the KMS host can be a solution. Follow these steps to activate the KMS host:

To activate the KMS host in the client’s computer, perform the following steps.

Step 1: Open the Elevated ‘Command prompt‘.

open command prompt as administrator in Windows 8, 10 & 11

Step 2: Install the KMS key.

cscript.exe slmgr.vbs /ipk <KMS_Key>

Step 3: After installing the KMS Key, activate the KMS host online using the following command.

cscript.exe slmgr.vbs /ato

Solution 3: Download the Microsoft Diagnostic Tool

You can download the Microsoft Diagnostic Tool that will assist you in activating Windows without facing the error code 0xC004F041. Download this tool free from the Microsoft’s website.

Solution 4: Run Windows Activation Troubleshooter

Windows 10/11 features a built-in Activation Troubleshooter accessible through the ‘Get Help‘ section. This troubleshooter diagnoses the activation process, analyses the root cause of the problem, and subsequently resolves the issue.


The error ‘0xC004F041: Key Management Server (KMS) isn’t activated‘ can be resolved by enabling the KMS host and using the diagnostic tool and activation troubleshooter.