Sec_error_unknown_issuer Error Code

There are a few questions and several responses, but I've not found a clear and definitive answer on resolving this "This Connection is Untrusted."
1) Error occurs when attempting to reach any website
2) Add Exception/Get Certificate is of no help
3) Add Exception/Confirm Security Exception does allow access to the website, but only produces a Notepad-type screen
4) This has just started to occur on a PC, but not on a laptop connected to the same network.
5) When https://addons.cdn.mozilla.net/_files/426841/troubleshooter-1.1a-fx.xpi is typed in on the PC, the response is "Uh-oh, something went wrong! Error Code: 404" (That website popped up on this laptop where this question is being sent from, as a suggested install for resolving the problem.)
6) Suspect that when Charter changed our failing modem, a change was made to the PC by the service personnel, as that's the unit he used, not the laptop. My experience has been that there's no use going back to Charter (or virtually any other hands-on technical support operation) to ask what they did while repairing.
Any definitive troubleshooting advice? Perhaps with step 1, step 2, etc; and alternatives, if the resolution is that difficult?
Thanks. Help will be very appreciated, Joyce

FiddlerRoot usually indicates unwanted software being installed named similarly to BrowserSafeguard, BrowserSafe, SafeGuard
So check that in the Windows Control Panel.
See [/questions/982532#answer-520145]

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Firefox recently began blocking my companies instance of SAP to launch another page. How can I bypass (Error code: sec_error_unknown_issuer)

This Connection is Untrusted
You have asked Firefox to connect securely to xxxx.xx.xxx, but we can't confirm that your connection is secure.
Normally, when you try to connect securely, sites will present trusted identification to prove that you are going to the right place. However, this site's identity can't be verified.
What Should I Do?
If you usually connect to this site without problems, this error could mean that someone is trying to impersonate the site, and you shouldn't continue.
xxxx.xx.xxx uses an invalid security certificate. The certificate is not trusted because no issuer chain was provided. (Error code: sec_error_unknown_issuer)

hello ntbinkle, the issue with missing intermediary certificates ideally has to be solved by the server in question by properly implementing a certificate chain, linking the ssl-certificate for the url to the root certificate authority.
as a workaround, you might be able to manually import the missing intermediary certificate - therefore please attempt to add an exception on the bottom of the error page under ''i understand the risks'' & inspect the certificate (see the screenshot attached for instructions):
which '''issuer information''' does the certificate contain?

(Error code: sec_error_unknown_issuer) on all sites

I am getting the 'This Connection is Untrusted' page with this error message, (Error code: sec_error_unknown_issuer), on ALL of my regular websites when I go to log-in.

For reference to anyone in the future who might have this problem - I am using BitDefender security software and had to turn off the 'Scan SSL' option under the privacy settings to fix the issue.

This connection is untrusted with Error code: sec_error_unknown_issuer.

Hello,
When I try to open G-Mail & twitter and some other trusted websites, I got the following warning "This Connection is Untrusted" with Error code: sec_error_unknown_issuer.
For most of the site, I can bypass by clicking « I understand the risk » but this is a bummer but for Gmail and Twitter, there is no other button than "Get me out of here"
When I go through « about:support » and « reinitialise » system, I no longer have the problem, but not only it erases all my personnal set-up but the problem always come back when I restart my system
Date and time are set right.
I have also tried to reinstall completely FIREFOX to no avail
I am using McAfee Total protection 2014 & Firefox 31.0 on Windows 7 64 bits.
I have had this problem for the last 5 days and only Firefox.
Other Browser ( IE8.0) is working fine
I have searched for solutions but they all failed -
Deleting cert8.db did not solve the problem either
How do I solve this Problem?
Thanks and Regards

You can check the connection settings.
*Tools > Options > Advanced > Network : Connection > Settings
*https://support.mozilla.org/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":
*https://support.mozilla.org/kb/Firefox+cannot+load+websites+but+other+programs+can
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 that 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

Why am I suddenly getting this message from a page I have been using for 6 months(Error code: sec_error_unknown_issuer) how do I get my page back?

Why am I suddenly getting this message from a page I have been using for 6 months(Error code: sec_error_unknown_issuer) how do I get my page back?

Did you reset Firefox recently?
*https://support.mozilla.org/kb/reset-firefox-easily-fix-most-problems
If that is the case then you may have lost intermediate certificates that were stored in the cert8.db file in the Firefox profile folder.
Check out why the site is untrusted (see the Technical details) and if this is caused by a missing intermediate certificate then see if you can install this intermediate certificate from another source.
Some firewalls monitor secure (https) connections and send their own certificate instead of the website's certificate.
You can retrieve the certificate and check details like who issued certificates and expiration dates of certificates.
*Click the link at the bottom of the error page: "I Understand the Risks"
Let Firefox retrieve the certificate: "Add Exception" -> "Get Certificate".
*Click the "View..." button and inspect the certificate and check who is the issuer.
You can see more Details like intermediate certificates that are used in the Details pane.

Error code: sec_error_unknown_issuer while opening Gmail and many other trusted websites!

I tried opening G-Mail and some other trusted website and Got "This Connection is Untrusted" with Error code: sec_error_unknown_issuer.
There is no other button then "Get me out of here".
Date/time are also set right.
I am using Eset Smart Security 7 and Firefox on Windows 8 Single.
I faced this problem just 2 days back just in Firefox. All other Browsers (Chrome, Iron, IE10) are working as Normal.
How do i solve this Problem?
Regards

Thanks a lot Sir.
It worked wonders.

I try to go to Google and get Error code: sec_error_unknown_issuer

I try to bring up Google and get this message:
This Connection is Untrusted
You have asked Firefox to connect securely to www.google.com, but we can't confirm that your connection is secure.
Normally, when you try to connect securely, sites will present trusted identification to prove that you are going to the right place. However, this site's identity can't be verified.
What Should I Do?
If you usually connect to this site without problems, this error could mean that someone is trying to impersonate the site, and you shouldn't continue.
www.google.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. (Error code: sec_error_unknown_issuer)
I'm on a brand new computer. All I've loaded is Kaspersky Internet Security. This problem is *very* frustrating and annoying.
Yes, I tried deleting the cert8 file and restarting Firefox. Same problem.
Help!!!

And again, even when I exit the Kaspersky anti-virus software, I still get the error message. That does make it seem like the problem must be with the new release of Firefox (maybe in conjunction with Windows 8.1?), not with the anti-virus software.
Like Lydia, I really don't want to get into the business of just adding dozens of exceptions. That would seem to defeat the point of whatever security protection Firefox is trying to provide.

Site name) uses an invalid security certificate. The certificate is not trusted because no issuer chain was provided. (Error code: sec_error_unknown_issuer)

I am working with Firefox 35.0 I get the security certificate error message of site name) uses an invalid security certificate. The certificate is not trusted because no issuer chain was provided. (Error code: sec_error_unknown_issuer).
This happens on each page that I go to. I can pull the page up with no problem with Explorer. Please Help. I don't have any security software that would be stopping or scanning SSL.

Check the date and time and time zone in the clock on your computer: (double) click the clock icon on the Windows Taskbar.
Check out why the site is untrusted and click "Technical Details" to expand this section.
If the certificate is not trusted because no issuer chain was provided (sec_error_unknown_issuer) then see if you can install this intermediate certificate from another source.
You can retrieve the certificate and check details like who issued certificates and expiration dates of certificates.
*Click the link at the bottom of the error page: "I Understand the Risks"
Let Firefox retrieve the certificate: "Add Exception" -> "Get Certificate".
*Click the "View..." button and inspect the certificate and check who is the issuer of the certificate.
You can see more Details like intermediate certificates that are used in the Details pane.
If "I Understand the Risks" is missing then this page may be opened in an (i)frame and in that case try the right-click context menu and use "This Frame: Open Frame in New Tab".
*Note that some firewalls monitor (secure) connections and that programs like Sendori or FiddlerRoot can intercept connections and send their own certificate instead of the website's certificate.
*Note that it is not recommended to add a permanent exception in cases like this, so only use it to inspect the certificate.

Getting error "The certificate is not trusted because no issuer chain was provided. (Error code: sec_error_unknown_issuer)"

I am using site "https://www.ultimatix.net" for learning purpose. This site directs to another site for web based learning, which is "icalmscontent.ultimatix.net". It is giving error "icalmscontent.ultimatix.net uses an invalid security certificate.
The certificate is not trusted because no issuer chain was provided.
(Error code: sec_error_unknown_issuer)",
and there is no button to add exception. Please help.

hello nitin2joy, the "add exception"-button is not accessible on framed pages for security purposes (to avoid phishing/impersonating by malicious sites).
in case the page you're trying to access is embedded in an iframe, right-click the error page, click on "this frame" > "show only this frame" and hopefully you can add an exception in the next step. this should only be necessary once if you choose to permanently store the exception.

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I receive the following error message when opening the addons tool bar...
support.mozilla.com uses an invalid security certificate.
The certificate is not trusted because the issuer certificate is unknown.
(Error code: sec_error_unknown_issuer)

Did you check the details of that certificate like the issuer and when it is valid by retrieving the certificate?
* Click the link at the bottom of the error page: "I Understand the Risks"
Let Firefox retrieve the certificate: "Add Exception" -> "Get Certificate".
* Click the "View..." button and inspect the certificate and check who is the issuer.
You can see more Details like intermediate certificates that are used in the Details pane.

Cannot delete file from external hard drive (error code 36) in Finder, but Terminal is ok

I have a relatively new Macbook Pro Retina 15" and have a Western Digital 1 TB Passport. I've been using the passport for about a year now without any problems on older Macbooks in my house. I used to be able to read and write to this drive no problem. I am using the Paragon NTFS for Mac software in order to read and write to the NTFS drive. When I navigate through the drive in Finder, if I try to create a new folder, I do not have a problem. If I try to delete that folder I just created, I get this error:
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rm -rf "untitled folder"
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Thanx for such qucik reply!!! The pages were great, it had an answer for my problem, but unfortunately it also involved me dealing with it only on the MacIntosh HD itself, not on mounted external drive I suppose... So it didn't work they say that there is an icon in the left corner indicating locked folder - I don't see any icon on it. It says you can untick the box to unlock the folder - there is no tick to be unticked. Finally, they say that if I don't have permition or rights I cannot delete it. But how do i change permittion which already says that i can read and write in it? So everything appears to be normal only I cannot delete it. there is not even any warnig telling me I don't have enough rights, it just requires the password and after me typing it in it makes the sound of scraping paper but does nothing more. I aslo had some problems with emptying Trash after being seemingly succesful with one file and had got so far to have them appear in the Trash (no clue how this one actully got there though..) I followd the advice and emptied the Trash with Terminal. The Folder is still there but it shows 0 Kb... So far so good BUT: It is still on the external drive, so I obviously only managed to copy it into the Trash!!! Phew, innit a bit too tight to poor owners, this macbook?? I want my rights back!

Report generation failed----error code:-17205; Access Denied.

Hi, All
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    detail:
    An error occurred calling 'Save' in 'Report' of 'NI TestStand 2010 SP1 API'
Access Denied.. Error writing to file 'D:\program\seq\xxx.xml'.
The file might be open in another application. If file access is intermittently denied, you should try disabling the Microsoft FindFast utility.
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Hm, it looks like the file might be open in another application. If you see that file accesss is intermittently denied, you should try disabling the Microsoft FindFast utility.
CTA, CLA, MTFBWY

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Sec_error_unknown_issuer Error Code

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