My connection is not secure
I've tried everything suggested, but my connection stays not secure on every site.
Here is the error message:
https://search.yahoo.com/yhs/search?p=Peer%E2%80%99s+Certificate+issuer+is+not+recognized.+&ei=UTF-8&hspart=mozilla&hsimp=yhs-002 Peer’s Certificate issuer is not recognized. HTTP Strict Transport Security: true HTTP Public Key Pinning: false Certificate chain: -----BEGIN CERTIFICATE----- MIIDRjCCAi6gAwIBAgIQdTUmngjf/IRId/IdXGuoSDANBgkqhkiG9w0BAQsFADAb MRkwFwYDVQQDDBBzZWFyY2gueWFob28uY29tMB4XDTE2MDYxNjIwMDIxM1oXDTIy MDYxNjIwMDIxM1owGzEZMBcGA1UEAwwQc2VhcmNoLnlhaG9vLmNvbTCCASIwDQYJ KoZIhvcNAQEBBQADggEPADCCAQoCggEBALouw/D3pFEy26R36UapzY3WniHYwYbM SR/RE7lBecrjxOCVa5rlVb38uHxiBvivcMImEb/8rPFWKqzIK/B9YwqpVXTX657O Km4X9S/ftRoxfCHxn3XV5Tm9FVWLL+0BKyQdJ+W5rIQQfGvFuV3bYZI/rPDCeZu/ 4ej4GJbLk75+vq55xF6AG7QHqqZt3XO1M380owNxXlrcDuubSG69DeaEbWoRmcQO hTqZzft5QMDE12Kkbo/NMOuHauY61hachFrbZZIrCc4unfmoAQ/lngEKqcwLUnic i1aBSAp1xpY6nx6c95qtBJShFu7X7GYMT55AX0Dt/4JspFPnzdRc0pUCAwEAAaOB hTCBgjAOBgNVHQ8BAf8EBAMCBLAwEwYDVR0lBAwwCgYIKwYBBQUHAwEwGwYDVR0R BBQwEoIQc2VhcmNoLnlhaG9vLmNvbTAfBgNVHSMEGDAWgBT/5jx/zxHZVIE8Y7nV z8NVySqMsTAdBgNVHQ4EFgQU1hD6x0N9Ij0gsgzYfihumq+Ai+owDQYJKoZIhvcN AQELBQADggEBAF1/Su1ZVYijHgFKvJ4RuG3GOw/hNx4nYgYhYqMBLlQM0k8kMSHZ t0GuyxSecd4FbmZcq10tUknWu4HbVQ7d37uauNGWuITcie7vnQiVb5uogfWAfKN4 ndjy9TjKO7GKG5f7dfgDGCSs6x7x+DpFU9ed5eCHG1Aoi9JoPp8W+LrBp1ZkmqgA 6NTEFlh7Py8NlM/A+aghQVhArHnkOslo/BdEU/NLha9CkKQaJNE3C37MCkZhBz48 K5cqsJKUNFboQFsF3t4cJ0cLOqBtG7QHvpZANUwLLocOFOhbfpaee/I8X2qClN3D 66G02aAtVzm5jQU2rl17lfTe1NGbZjjsg0U= -----END CERTIFICATE-----
Wšykne wótegrona (1)
This is a self-signed certificate for search.yahoo.com. Subject CN=search.yahoo.com Issuer CN=search.yahoo.com Valid From June 16, 2016, 1:02 p.m. Valid To June 16, 2022, 1:02 p.m.
What are the connection settings?
- Options/Preferences -> Advanced -> Network : Connection -> Settings
- https://support.mozilla.org/en-US/kb/Options+window+-+Advanced+panel
If you do not need to use a proxy to connect to internet then try to select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly.
See "Firefox connection settings":
Boot the computer in Windows Safe mode with network support to see if that has effect in case security software is causing problems.
- http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/
- http://www.7tutorials.com/4-ways-boot-safe-mode-windows-10
Do a malware check with several malware scanning programs on the Windows computer.
Please scan with all programs because each program detects different malware. All these programs have free versions.
Make sure you update each program to get the latest version of their databases before doing a scan.
- Malwarebytes' Anti-Malware:
http://www.malwarebytes.org/mbam.php - AdwCleaner:
http://www.bleepingcomputer.com/download/adwcleaner/
http://www.softpedia.com/get/Antivirus/Removal-Tools/AdwCleaner.shtml - SuperAntispyware:
http://www.superantispyware.com/ - Microsoft Safety Scanner:
http://www.microsoft.com/security/scanner/en-us/default.aspx - Windows Defender:
http://windows.microsoft.com/en-us/windows/using-defender - Spybot Search & Destroy:
http://www.safer-networking.org/en/index.html - Kasperky Free Security Scan:
http://www.kaspersky.com/security-scan
You can also do a check for a rootkit infection with TDSSKiller.
- Anti-rootkit utility TDSSKiller:
http://support.kaspersky.com/5350?el=88446
See also:
- "Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked