What to do if the server certificate is invalid
Solutions to invalid server certificate: 1. Modify the system time; 2. Reinstall the server certificate; 3. Cancel the proxy server settings; 4. Reinstall the system to solve the problem.
Solution to invalid server certificate:
Method 1: Check whether the system time is correct and modify it System time
1. Click Start-Control Panel to open the Control Panel.
2. In the Control Panel, find Language and Region and open it.
3. Click to set the time and date.
4. Select the internet time. Click Change settings.
5. Check the box to synchronize with the internet time server. Then click OK.
Method 2: Reinstall the server certificate (complete solution)
The server certificate refers to the SSL server certificate. If it is invalid, it means that the SSL certificate deployed by the website is not trustworthy and is not issued by It is issued by a legitimate CA organization, but the browser does not trust it and needs to reinstall the certificate.
If you don’t have a certificate, you need to apply for it from an institution such as CA. There are also free SSL server certificates that need to be downloaded. If you have downloaded a certificate for a website, you just need to install it.
1. First open your browser, click Mail in a blank space, and then check the menu bar.
2. Find Tools in the menu bar, and find the Internet option in the drop-down menu of the tool.
3. In the internet options, click Content.
4. Find the certificate in the Content tab and click on it.
5. Click Trusted Certificate Authority
6. Then click Import and follow the prompts to complete it step by step.
7. Restart the browser
Method 3: Cancel proxy server settings
IE-Tools-Proxy Server-Select (Do not use proxy server)
Some of this plan is successful, and some is failed. You can give it a try.
Method 4: Reinstall the system
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