Download and install the free signature (if the certificate expires, you can adjust the time back to one year and try again, and remember to adjust the time back after installation ~), then open it, enter the settings, and select the signature certificate key and the self-signed certificate key (the certificate and key can be placed in the mobile phone or card after downloading, so it is recommended to prevent them from being used after changing the card. Declare that the certificate is not used for installation, but embedded in the software. When the software is installed, it will automatically check the information of the certificate ~) and set the storage location of the generated file (it can be directly stored in the E disk). Then add tasks and execute them. Go to xplore, or file management, and install signed (usually signed) files in the future.