Hi. My name is***** you for your question and the opportunity to assist.
KB971033 can be downloaded from here:
To open the command prompt with elevated privileges
click the start button and in the search area type: cmd
Right-click on the search result at the top and select Run as Administrator.
Were you able to create the .reg file and add it to the registry?
Hi Jeffrey. I apologize as I may have misread your question earlier.
If you want to check if you have KB971033 installed, open Control Panel>>Windows Update.
In the lower left click Installed Updates. In the search box in the upper right corner type: kb971033
and run the search. If it's found, left click to select the entry and click Uninstall.
You can manually reactive Windows using your 25 character product key.
On your keyboard, hold down the Windows logo key (just to the left of the spacebar) and press R.
In the Run box text area type: slui 3 and click OK
Enter your product key and click Next to start the activation.
If you don't know your product key I can show you how to recover it
via inventory software.