Unable to activate Windows Vista (Error code 0xC004C003)

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I use Windows Vista in my PC. When I am trying to activate Windows Vista, I am just receiving the subsequent error message:

An error has occurred

I also receive a specific error code and its description.

It’s just causing me problem. I just stuck in one place. Can anyone help me please!

Error code



The activation server determined the specified product key is in use.



Best Answer by Eric Bayner
Best Answer
Best Answer
Answered By 0 points N/A #88137

Unable to activate Windows Vista (Error code 0xC004C003)


Technique A : Use Microsoft Knowledge Base item 950756

This system is evaluated: Moderately effortless. For additional data about how to purpose this lapse inform, click the emulating section number to see the section in the Microsoft Knowledge Base: 950756 (https://support.microsoft.com/en-us/help/950756/error-message-when-you-try-to-activate-a-copy-of-windows-by-using-the )

Error inform when you attempt to initiate a duplicate of Windows Vista by utilizing the Windows Activation wizard: "The Software Licensing Service reported that the unit key is invalid: 0xC004F050 Since this system worked, you are fulfilled. Since this system did not work for you may would like to request from someone help, or you could would like to contact Support (https://support.microsoft.com/contactus/) for your following strides.

Back to the top Technique B: Verify your unit key and utilize the "Change unit key" emphasize to reactivate Windows Vista This technique is appraised easy. In the event that you were coordinated to this system, you dropped in an off base unit key. See the unit bundling to verify that you hold the right unit key. Then, take after these strides to utilize the "Change item key" emphasize and reactivate Windows Vista: Click Start.

Fall this imageExpand this visualization the Start catch click Computer, and afterward click System lands on the toolbar. In the Windows actuation area, click the Change item key Fall this imageExpand this representation User Account Control liberty. In the event that you are incited for a director secret key or for affirmation, sort your watchword, or click Continue. In the Product key box, sort the item key, then after that click Next.

Note: Check the item bundling to verify that you are dropping in the right item key. Follow the strides in the Windows Activation Wizard to finish the initiation course of action.

Answered By 0 points N/A #196096

Unable to activate Windows Vista (Error code 0xC004C003)


There are some solutions to this problem.

Retype the Product Key:

1. Go to My Computer.

2. Select System Properties and Taskbar.

3. At the bottom there should be a "Change product key". Click it.

4. Retype your Product Key and that should do it.

Reactivate by Phone:

5. Click the Start Button on the Desktop.

6. Type in the Search field "SLUI 4.exe"(without quotes) and press Enter.

7. Select your country.

8. Call the phone number listed and follow the automated prompts.

Download a Third-Party Software.


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