My CA certificate cannot be used. It is said that the signature failed. How to solve it?

Reasons for not installing plug-ins.

1. If you are visiting the judge application system for the first time, whether you are a new or old judge, you must register first. After entering the system, there is an activated certificate in the information maintenance on the left. After the certificate is activated, you can log in and drive with CA. Turn off antivirus software and security guards.

2. Please close or uninstall programs such as "Firewall" and "Internet Assistant" and documents such as Word and Excel before installation; 2. Run the enterprise digital installation program downloaded from the Internet (that is, double-click "setup5.0.exe file");

3. Click Next to start the installation. During the program installation, click Yes for all security warnings, system prompts and Yes or No options.

4. Open the browser: insert the tax control key into the usb interface of the computer. Find the 32-bit IE browser, click the Start menu in the lower left corner of the desktop and then click All Programs?

5. Locate the 32-bit IE browser, right-click and select Run as Administrator. (If there are two IE browsers in the computer, one is 64-bit and the other is 32-bit, choose the 32-bit browser that is not marked with 64-bit. )