2. In the opened local group policy editor window, find: User Configuration-Management Template;

3. Find "System" in the expanded item of the management template and click "Open";

4. In the expanded item of the system, find: driver installation, and left-click: driver installation;

5. In the right window corresponding to driver installation, find: code signing of device driver, and click: code signing of device driver.

6. In the opened device driver code signing window, we select Enabled, and there are Warning, Blocking and Ignore in the drop-down box of options. Here, you choose to install the driver file without digital signature.

7. After the driver installation is completed, it is suggested to set the item just set to ignore as warning (default setting) to enhance the security of the system. Then press "Apply" to save, and then press "OK" to finish the setting. The computer win7 can close the printer driver and install the driver automatically.