Why can't I install social security digital certificate in windows7 system?

Wrong method. The correct method is as follows:

1, which needs to be started on the computer first? Click the control panel;

2. In the control panel, we find: Internet option, then click the left mouse button and double-click: Internet option;

3. In the Internet properties window that opens, click Security, and then click Custom Level (c); Click "OK".

4. In the pop-up window of Security Settings-Internet Area, we find: ActiveX plug-in project, change all contents to enabled, and finally click OK; ? (Note: After installing the ABC online banking certificate, please restore these changed items, mainly those that will show unsafe items. Click the default level to the right of the custom level. )

5. In the "Internet Properties" window, click: Advanced, and find: Use SSL 2.0 and SSL 3.0 in the drop-down box, and tick; Restart complete.