Sometimes we need to change or re-enter the product keys in Windows 7, Windows Vista or their Server variants to solve Windows Activation problems or to activate your Windows (30 Day Trial) after buying a genuine license or to upgrade Windows from one edition to another one.

To know more about Upgrade paths of Windows 7, Read Here. To change product key or re-activate your Windows that already installed in the system, just follow these simple steps.
How To:
Method 1

1. Right click on Computer and choose Properties, and look the bottom of System Properties dialog box.

2. Under Windows activation, click on Change Product Key (Already activated)or Click here to activate Windows now (Not activated).

System Properties

On Windows Vista, you may need to provide administrator password or confirmation on UAC Prompt.

3. It displays Windows Activation wizard, where you can type the new product key and then click on Next to change and activate your Windows operating system.

Windows Activation Wizard

Method 2

1. Run Command Prompt as Administrator (Elevated Command Prompt)

2. Now type following command with your new product key.

cscript “%SystemRoot%\System32\slmgr.vbs –ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX”

It will change the license only on your already installed Windows. It is required to activate your Windows and you can do this by following this command.

cscript “%SystemRoot%\System32\slmgr.vbs –ato”

You can find more command-line options related to Windows Activation Process by executing this-

cscript “%SystemRoot%\System32\slmgr.vbs /?”

Applies To:

  • Windows 7
  • Windows Server 2008 R2
  • Windows Vista
  • Windows Server 2008

5 responses to “How to Change Product Key in Windows 7 and Windows Vista”

  1. Sandeep23683 Avatar

    outstanding yaar….ab tak kanha the..if it will work than it would be rocking…

  2. Justin B Avatar

    the switches have the wrong syntax. its not -ipk -ato, its /ipk or /ato

    1. Ramesh Kumar Avatar

      the switches are correct. both -ipk and /ipk work; you can use any of them.

  3. Oscar Avatar

    file slmgr.vbs missing on WIndows 7 Pro

  4. TechGopal Avatar

    help full post….

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