There is no such thing as a universal, working, free activation code.
Check your iCloud or Google Drive trash folders. Often, deleted photos and notes remain in cloud trash bins for 30 to 60 days before permanent deletion. phonerescue activation code link
Single licenses are locked to one computer for security reasons. If you need to transfer your license, contact support to have them unbind the license from your old computer before installing on the new one. There is no such thing as a universal,