First, after you confirm that the installed controls are safe, set ie to allow unsigned controls to be installed. Setting method: 1. Open IE browser and click Tools → Internet Options → Internet Options. 2. Select the Security tab, select the Internet, and then click Custom Level to open the Security Settings page. 3. Locate "Download unsigned ActiveX controls" and click "Prompt". 4. Confirm the exit. 5. Click the "Print" button in a document of Huizhi Online to open the print page. 6. Click "Preview", click the pop-up block information bar, and select "Install ActiveX Control".