I see an error in the security certificate
When there is a security certificate error, you will see this message:
- “Your connection is not protected”.
- “This site presents a security threat to your computer”.
- “Incorrect certificate”.
- “Error in security certificate”.
- “This is an untrusted connection”.
Errors related to an insecure connection or invalid security certificate may be caused by a conflict between your browser and computer settings. Errors may also occur due to an antivirus program. To locate the cause of a certificate error, look for its code at the end of the message.
Error code | Solution |
---|---|
| Make sure that the correct address is entered in your browser's address bar — mail.yandex.com or passport.yandex.com , and that the / symbol is after com rather than a period or some other symbol. |
| Make sure that your date and time are correctly set on your computer. If they are not set correctly, then the system may incorrectly determine that the certificate period hasn't started yet or that it has already expired. |
| Make sure that your antivirus settings are not configured to check HTTPS-connections. For more information about how to do this using Kaspersky Internet Security and ESET NOD32 Smart Security, read the section under the table. If you do not have an antivirus program on your computer, hackers may switch your security certificate using malware or an MITM attack. Check your computer for viruses using free antivirus programs: CureIt! from Dr.Web or the Virus Removal Tool from “Kaspersky Lab”. |
Error code | Solution |
---|---|
| Make sure that the correct address is entered in your browser's address bar — mail.yandex.com or passport.yandex.com , and that the / symbol is after com rather than a period or some other symbol. |
| Make sure that your date and time are correctly set on your computer. If they are not set correctly, then the system may incorrectly determine that the certificate period hasn't started yet or that it has already expired. |
| Make sure that your antivirus settings are not configured to check HTTPS-connections. For more information about how to do this using Kaspersky Internet Security and ESET NOD32 Smart Security, read the section under the table. If you do not have an antivirus program on your computer, hackers may switch your security certificate using malware or an MITM attack. Check your computer for viruses using free antivirus programs: CureIt! from Dr.Web or the Virus Removal Tool from “Kaspersky Lab”. |
- Open the antivirus window and click
in the lower-left corner.
- Go to Advanced and select Network.
- In the Check protected connections section, select the Don't check protected connections value and confirm your choice.
- Open the antivirus window, go to Settings, and click Advanced.
- In the Enable filtration of SSL/TLS protocol option. section, disable the
- Under Scan HTTPS protocol option. , disable the
- Click OK to save changes.