To determine whether KB 971033 is installed, use one of the following methods.

• Open the Installed Updates item in Control Panel (Control Panel > Windows Update > View update history> Installed Updates), and then look for Update for Microsoft Windows (KB971033) in the list.
   
• Run the following command in a Command Prompt window as administrator, and then look for Microsoft-Windows-Security-WindowsActivationTechnologies-package~31bf3856ad364e35~amd64~~7.1.7600.16395 in the results:
   
  dism /online /get-packages
• Run the following command at a command prompt, and then look in the results for an indication that KB 971033 is installed:
   
  wmic qfe where HotFixID="KB971033"
• Run the following command in Windows PowerShell, and then look in the results for an indication that KB 971033 is installed:
   
  Get-Hotfix -id KB971033

If KB 971033 is currently installed, use one of the following methods to remove the update. We recommend that you restart the system after the update is removed.

• In the Installed Updates item in Control Panel (Control Panel > Windows Update > View update history > Installed Updates), right-click Update for Microsoft Windows (KB971033), and then select Uninstall.
   
• Run the following command in a Command Prompt window as administrator:
   
  wusa /uninstall /kb:971033
   
• Run the following command in a Command Prompt window as administrator:
   
  dism /online /Remove-Package /PackageName:Microsoft-Windows-Security-WindowsActivationTechnologies-Package~31bf3856ad364e35~amd64~~7.1.7600.16395

After KB 971033 is uninstalled, or after it no longer appears as installed, rebuild the activation-related files and then reactivate the system by running the following commands in a Command Prompt window as administrator:

net stop sppuinotify
sc config sppuinotify start= disabled
net stop sppsvc
del %windir%\system32\7B296FB0-376B-497e-B012-9C450E1B7327-5P-0.C7483456-A289-439d-8115-601632D005A0 /ah
del %windir%\system32\7B296FB0-376B-497e-B012-9C450E1B7327-5P-1.C7483456-A289-439d-8115-601632D005A0 /ah
del %windir%\ServiceProfiles\NetworkService\AppData\Roaming\Microsoft\SoftwareProtectionPlatform\tokens.dat
del %windir%\ServiceProfiles\NetworkService\AppData\Roaming\Microsoft\SoftwareProtectionPlatform\cache\cache.dat
net start sppsvc
cscript c:\windows\system32\slmgr.vbs /ipk <edition-specific KMS client key>
cscript c:\windows\system32\slmgr.vbs /ato
sc config sppuinotify start= demand

Note In the first "cscript" command, replace <edition-specific KMS client key> with the actual key. For more information, see the following Microsoft Docs article:

KMS Client Setup Keys

The following table lists the KMS client keys for each edition of Windows 7.