Wait for the validation to finish and follow the prompts to complete the installation. Method 2: Use the Windows Control Panel
The most user-friendly method for changing the product key involves utilizing the built-in "Backstage" view introduced in Office 2010. This method is recommended for end-users and single-workstation modifications. office 2010 change product key
As a final, more invasive alternative, advanced users may edit the Windows Registry. The product key information for Office 2010 is stored in encrypted form under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\14.0\Registration . However, manually typing a new key into the registry is not as simple as it sounds; Microsoft stores a digitally signed binary blob, not plain text. Attempting to edit it directly often corrupts the license. Thus, the practical method using the registry is to delete the entire Registration subkey containing the corrupted license, then restart any Office application. This forces Office to behave as if it is being installed for the first time, prompting the user to enter a new product key via the setup wizard. This “nuclear option” should be used only as a last resort, after backing up the registry. Wait for the validation to finish and follow