If you already have your key, follow these steps to register the software: PC HelpSoft Driver Updater Question Mark (?) icon in the top right corner. from the menu. copy and paste your license key into the field to avoid typos. Activate Now to complete the process. PC HelpSoft Finding a Lost License Key
Use the built-in feature (Tools > Restore Drivers). It rolls back to the previous working state in one click. licence key pc helpsoft driver updater