Do you receive one of the following error messages during the activation of Registry Reviver?
Product key invalid or is already in use
Invalid product key length
(These error message are generated by the old build of Registry Reviver)
What you need to do:
Please reinstall Registry Reviver by downloading the latest version from here.
Once you have installed the latest version of Registry Reviver, please use your license key to successfully activate the product.
Still having trouble? Look here.