Select the Tools menu option, and then select Macro Security. Click the high button in the security dialog box to set the security level to high. Close the file and any other instances of applications currently running on the computer (close any applications that use the currently running applications). Open the file again, and then check the details of the trusted certificate. If you trust the certificate issued by this publisher, check Always trust macros from this publisher. Click the Enable button to allow the macro to run. The "Gao" application has a signed macro, but you selected "Disabled" in the macro warning box when you opened the file. Use the following steps to enable macros: Close files and any other instances of applications currently running on your computer (close all applications currently running). Open the file again, and then check the details of the trusted certificate. If you trust the certificate issued by this publisher, check Always trust macros from this publisher. Click the Enable button to allow the macro to run. "High" or "very high". Macros are unsigned and will be automatically disabled by the application. If you have confirmed that you can trust the source of unsigned macros, use the following steps to enable macros: Select the Tools menu, and then select Macro Security. In the security dialog box, click the option button and set the security level to medium. Close the file and any other instances of applications currently running on your computer. Open the file again, and when prompted to allow unsigned macros to run, click Enable. After accepting the macro, please reset the macro security level to the original setting.