Windows7 requires drivers to be digitally signed, otherwise they cannot be used normally, but sometimes drivers without digital signatures are needed. At this time, driver signature enforcement is disabled, as follows: 1. Windows7 system disables driver signature enforcement method Start-Run (enter gpedit.msc)- OK or press Enter. Open the local group policy editor; 2. In the opened local group policy editor window, we find: user configuration-management template; 3. Found in the management template item: system consolidation; 4. In the system item, we find: driver installation, left click: driver installation; 5. In the right window corresponding to the driver installation, we find: code signing of the device driver, left key: code signing of the 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. Warning: Notify users of files that are not digitally signed, and let users decide whether to stop or continue the installation, and whether to allow the installation of files that are not digitally signed. Block: Indicates that the system refuses to install files that are not digitally signed. Ignore: Command the system to continue the installation (including installing files that are not digitally signed). If we want to install a driver file without digital signature, we can choose: Ignore, and then click: OK; 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.