In Windows 7 or Windows Vista, go to Start and then Control Panel. Click or tap on the System and Security link (10/8/7) or System and Maintenance link (Vista). Note: If you're viewing the Small icons or Large icons view (10/8/7) or Classic View (Vista) of Control Panel, you won't see this link. Hello, I have a WIndows 7 key. I used it for my Windows 7 edition on my PC. But now, I lost that piece of paper. I am nervous about some day my PC will go to the hell and I lost that genuine key.

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• Windows 10 Change Product Key

Activation is a protection mechanism implemented in Windows 10 and earlier versions against piracy. It first appeared in Windows XP and exists with different changes and improvements in Windows Vista, Windows 7, Windows 8 and Windows 10. When activation is successful, usually it indicates that your copy of Windows is genuine. There may be times when you need to deactivate your copy of Windows 10 in order to transfer your license to another PC. Here is how you can deactivate your copy of Windows 10.

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Activation verifies that your copy of Windows is not used on more devices than the license allows. If you are about to sell or give away your PC but want to keep Windows 10 installed there, it is a good idea to deactivate it. Deactivation is also useful if you want to use your product key on some other PC and stop using it on the current PC.

In this article, we will see how to deactivate Windows 10 by uninstalling the product key. Additionally, we will see how to install another product key instead.

To deactivate Windows 10 by uninstalling the product key, you need to do the following:

1. Open an elevated command prompt.
2. Type or paste the following command:
3. Wait till the command finishes its work. At the end, you will see the following message:

Windows 10 will become deactivated. You can visit the Settings app and check out the 'Activation' page and check the activation state. It will look like this:

After you deactivate Windows 10, you might be interested in clearing the product key from the Registry so it cannot be viewed with special apps and scripts.

Please keep in mind that if you reach the online activation limit, e.g. by activating many PCs with the same key, you may have to activate your copy of Windows by phone since the online activation will fail.

To install a new product key, you need to type the following command in the elevated command prompt:

We have a nice article which covers this process in detail: How to change Windows 10 product key.

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This article applies to Office Home & Business, Office Professional, and individually purchased Office apps.

If you bought multiple copies of Office and used the same Install button to install Office on multiple PCs, activation fails on the other PCs. This happens because each Install button is associated with a unique product key that can only be installed on one PC. To fix this, you can change the product key for the other PCs where you installed Office.

Note: After you change your product key, we recommend that you create a list to manage the product keys that you've installed. To learn how, see Manage multiple one-time-purchase Office installs that use the same Microsoft account.

Select your Office version below.

1. On the device where you want to change the key, open any Office app, select the File menu and then select Account near the bottom of the menu.

2. Under Product Information, select the Change License button.

   If there is no Change License button, you may need to install Office updates.

3. Do one of the following:

   • If you're signed in, select Use a different account, and then select Enter product key instead.

   • If you're not signed in, select Enter product key instead.

4. Enter your Office 2019 or Office 2016 product key, and then select Install this product instead.

   If your product key is new, follow the prompts to complete the redemption process.

5. Office begins the update process. Close all Office apps to finish the process.

1. Uninstall Office from the PC where activation is failing. To do this, see Uninstall from a PC.

2. On the PC where you uninstalled Office, sign in to your Services & subscriptions page with the email and password associated with the Microsoft account that was used to install Office.

3. Reinstall Office by selecting Install Office for a one-time purchase that hasn't been activated. For help with installing Office, see Install Office on your PC or Mac.

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To switch an Office install to or from Office 365, see Switch your Office license.

Windows 10 Change Product Key

1. Sign in to your Services & subscriptions page with the email and password associated with the Microsoft account that was used to install Office.

   After you sign in, you should see a list of Office products that are associated with your Microsoft account.

2. For the first product that's listed on the page, select View product key. Copy or write down the product key. This is likely the product key that was used multiple times to install Office.

3. Select View product key for the remaining Office products and copy or write them down. These are likely the keys that you'll use to replace the key that was used multiple times.

4. On a PC where Office activation is failing, open the Command Prompt as described below:

   Windows 10 and Windows 8.1	Windows 7
   Select the Start button (lower-left corner). Type Command Prompt. Right-click the Command Prompt icon, and select Run as administrator.	Select the Start button (lower-left corner). Right-click Command Prompt and select Run as administrator.

5. From the drop-down list below, select your Office version and Windows version (32-bit or 64-bit) and run the commands as described.

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   • Select your Office and Windows version

   Tip: If you get an Input Error: Can not find script file.. message, it means that you used the wrong command. Don’t worry, running the wrong command won’t hurt anything. Double-check your Office and Windows versions and try a different command.

   1. Copy the following command, paste the command into the Command Prompt window, and then press Enter.

      cscript 'C:Program FilesMicrosoft OfficeOffice16OSPP.VBS' /dstatus

      The command prompt displays the last five characters of the product key that was used to install Office on the PC. Our example below uses XXXXX to represent these characters.

   2. Copy the following command, paste the command into the Command Prompt window, and replace XXXXX with the last 5 digits of the product key that was shown in the previous step. Press Enter to remove the product key.

      cscript 'C:Program FilesMicrosoft OfficeOffice16OSPP.VBS' /unpkey:XXXXX

   3. Copy the following command, paste the command into the Command Prompt window, and replace XXXXX-XXXXX-XXXXX-XXXXX-XXXXX with an unused product key from your list. Press Enter to change the key.

      cscript 'C:Program FilesMicrosoft OfficeOffice16OSPP.VBS' /inpkey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

   Tip: If you get an Input Error: Can not find script file.. message, it means that you used the wrong command. Don’t worry, running the wrong command won’t hurt anything. Double-check your Office and Windows versions and try a different command.

   1. Copy the following command, paste the command into the Command Prompt window, and then press Enter.

      cscript 'C:Program Files (x86)Microsoft OfficeOffice16OSPP.VBS' /dstatus

      The command prompt displays the last five characters of the product key that was used to install Office on the PC. Our example below uses XXXXX to represent these characters.

   2. Copy the following command, paste the command into the Command Prompt window, and replace XXXXX with the last 5 digits of the product key that was shown in the previous step. Press Enter to remove the product key.

      cscript 'C:Program Files (x86)Microsoft OfficeOffice16OSPP.VBS' /unpkey:XXXXX

   3. Copy the following command, paste the command into the Command Prompt window, and replace XXXXX-XXXXX-XXXXX-XXXXX-XXXXX with an unused product key from your list. Press Enter to change the key.

      cscript 'C:Program Files (x86)Microsoft OfficeOffice16OSPP.VBS' /inpkey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

   Tip: If you get an Input Error: Can not find script file.. message, it means that you used the wrong command. Don’t worry, running the wrong command won’t hurt anything. Double-check your Office and Windows versions and try a different command.

   1. Copy the following command, paste the command into the Command Prompt window, and then press Enter.

      cscript 'C:Program FilesMicrosoft OfficeOffice16OSPP.VBS' /dstatus

      The command prompt displays the last five characters of the product key that was used to install Office on the PC. Our example below uses XXXXX to represent these characters.

   2. Copy the following command, paste the command into the Command Prompt window, and replace XXXXX with the last 5 digits of the product key that was shown in the previous step. Press Enter to remove the product key.

      cscript 'C:Program FilesMicrosoft OfficeOffice16OSPP.VBS' /unpkey:XXXXX

   3. Copy the following command, paste the command into the Command Prompt window, and replace XXXXX-XXXXX-XXXXX-XXXXX-XXXXX with an unused product key from your list. Press Enter to change the key.

      cscript 'C:Program FilesMicrosoft OfficeOffice16OSPP.VBS' /inpkey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

   Tip: If you get an Input Error: Can not find script file.. message, it means that you used the wrong command. Don’t worry, running the wrong command won’t hurt anything. Double-check your Office and Windows versions and try a different command.

   1. Copy the following command, paste the command into the Command Prompt window, and then press Enter.

      cscript 'C:Program FilesMicrosoft OfficeOffice15OSPP.VBS' /dstatus

      The command prompt displays the last five characters of the product key that was used to install Office on the PC. Our example below uses XXXXX to represent these characters.

   2. Copy the following command, paste the command into the Command Prompt window, and replace XXXXX with the last 5 digits of the product key that was shown in the previous step. Press Enter to remove the product key.

      cscript 'C:Program FilesMicrosoft OfficeOffice15OSPP.VBS' /unpkey:XXXXX

   3. Copy the following command, paste the command into the Command Prompt window, and replace XXXXX-XXXXX-XXXXX-XXXXX-XXXXX with an unused product key from your list. Press Enter to change the key.

      cscript 'C:Program FilesMicrosoft OfficeOffice15OSPP.VBS' /inpkey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

   Tip: If you get an Input Error: Can not find script file.. message, it means that you used the wrong command. Don’t worry, running the wrong command won’t hurt anything. Double-check your Office and Windows versions and try a different command.

   1. Copy the following command, paste the command into the Command Prompt window, and then press Enter.

      cscript 'C:Program Files (x86)Microsoft OfficeOffice15OSPP.VBS' /dstatus

      The command prompt displays the last five characters of the product key that was used to install Office on the PC. Our example below uses XXXXX to represent these characters.

   2. Copy the following command, paste the command into the Command Prompt window, and replace XXXXX with the last 5 digits of the product key that was shown in the previous step. Press Enter to remove the product key.

      cscript 'C:Program Files (x86)Microsoft OfficeOffice15OSPP.VBS' /unpkey:XXXXX

   3. Copy the following command, paste the command into the Command Prompt window, and replace XXXXX-XXXXX-XXXXX-XXXXX-XXXXX with an unused product key from your list. Press Enter to change the key.

      cscript 'C:Program Files (x86)Microsoft OfficeOffice15OSPP.VBS' /inpkey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

   Tip: If you get an Input Error: Can not find script file.. message, it means that you used the wrong command. Don’t worry, running the wrong command won’t hurt anything. Double-check your Office and Windows versions and try a different command.

   1. Copy the following command, paste the command into the Command Prompt window, and then press Enter.

      cscript 'C:Program FilesMicrosoft OfficeOffice15OSPP.VBS' /dstatus

      The command prompt displays the last five characters of the product key that was used to install Office on the PC. Our example below uses XXXXX to represent these characters.

   2. Copy the following command, paste the command into the Command Prompt window, and replace XXXXX with the last 5 digits of the product key that was shown in the previous step. Press Enter to remove the product key.

      cscript 'C:Program FilesMicrosoft OfficeOffice16OSPP.VBS' /unpkey:XXXXX

   3. Copy the following command, paste the command into the Command Prompt window, and replace XXXXX-XXXXX-XXXXX-XXXXX-XXXXX with an unused product key from your list. Press Enter to change the key.

      cscript 'C:Program FilesMicrosoft OfficeOffice15OSPP.VBS' /inpkey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

   Tips:

   • The default installation for Office is 32-bit but if your PC has more than 4 GB of RAM, you probably have 64-bit Windows.

   • If you don't know which Office version is installed, see What version of Office am I using? To check whether Windows is installed as 32 or 64 bits, see Which Windows operating system am I running?

6. Now start an Office app, such as Word, and select Next to activate Office over the Internet.

7. Repeat this process for each PC where activation is failing.