SOLVED: ‘Establishing Secure Connection’ Problem in Chrome


Recently, when I was browsing the Internet using my Chrome browser, the browser started acting weird. I could connect to any website that is not secured with SSL but couldn't connect to any site that is secured with SSL. What's happening is that whenever I try to access a site that has been secured with the SSL, Chrome will get stuck at "Establishing Secure connection" phase and shows a timed out error ERR_CONNECTION_TIMED_OUT eventually.

To put it into perspective, I couldn't connect to Google, Facebook, Twitter, or any other site that has https:// in the URL because of this problem. But I have no problems whatsoever in accessing all those secure sites using other browsers like Firefox, Internet Explorer, and Opera. So, like any Windows user, I thought a simple restart would do that trick and I could use the Chrome browser normally.

Related: fix downloading proxy script error in Chrome

When I restarted, sure enough, I was able to connect to almost all the secure sites. But after a few minutes, the problem "Establishing Secure Connection" error has reappeared in the Chrome browser. So, I did some research and found out that Jonas Lieb has also faced and solved the same problem a couple years back.

What is the Problem

It turns out that the actual culprit in my situation is the installed Comodo Firewall. Whenever the Chrome browser is trying to access a secure site, it tries to read a lot of certificate files located in different locations. A couple of such files are issuers.sst and subjects.sst created by Comodo Firewall at the location C:\Users\UserName\AppData\LocalLow\COMODO\CertSentry\. These are the files that are conflicting with the Chrome browser.

Even though you can delete these files by simply pressing the delete key on your keyboard, they will be automatically created in a few moments by Comodo using the DLL file certsentry.dll. Even if you uninstall the Comodo software, the files may not be removed completely from your computer.

So, here is how you can fix Establishing Secure Connection error in chrome.

Related: Top 7 Free File Sync Software to Sync Files between Folders

Solving or Fixing Establishing Secure Connection Error in Chrome

Fixing Establishing Secure Connection error in Chrome is easier that you think. First off, Uninstall the Comodo Firewall or any other Comodo product from your PC. To do that, press "Win + X," and select the option "Programs and Features." If you are using Windows 7 or Vista, search for "add or remove programs" in the start menu.

establishing-secure-connection-programs-featuresThis action will open the "Programs and Features" window. Here, find the Comodo Firewall application, right-click on it and select the option "Uninstall." Now follow the on-screen instructions to completely uninstall Comodo. Optionally, you can run CCleaner to clean any leftovers.


Now open the Windows file explorer and navigate to the folder C:\Windows\System32\. Here, scroll down and find the DLL file certsentry.dll.


Related: Top 11 Best Dark Themes for Google Chrome [2018]

Once you found the file, right-click on the file and rename it something else. For instance, I've renamed it to certsentry.dll.bkp. Since the file doesn't belong to Windows, you can even delete the file, if needed. Moreover, to modify any system file, you first need to take ownership and full permissions of that specific file.


Once renamed, the file will look something like this.

Related: All Essential Google Chrome Keyboard Shortcuts - PDF Download [Free]


After renaming the file, navigate to the folder C:\Users\UserName\AppData\LocalLow\COMODO\CertSentry\ and delete both the files issuers.sst and subjects.sst. If you want, you can delete the entire COMODO folder.

Note: the AppData folder in Windows is hidden by default, you need to enable view hidden items on the Ribbon menu (View -> select "Hidden Items") option to view the folder.


That's all there is to do and you've successfully solved Establishing Secure Connection error in your Chrome browser. Just restart your system and you are good to go.

The thing is, when I reinstalled the Comodo Firewall, it did not create both the DLL file and the files related to certificates. So, I suspect that the files that are causing issues with the Chrome browser are related to an older version of Comodo Firewall.

Related: A complete List Of All Chrome URLs and Their Purposes

Hopefully that helps and do comment below sharing your thoughts and experiences about this Establishing Secure Connection error in Google Chrome.


  1. Hah! I’ve been fighting this for a week. Both of my chrome-based browsers (Chrome and Comodo Dragon) were timing out on https sites. No Comodo firewall but apparently the other Comodo product was enough to drop that dll into System32. Thanks!

  2. Hi. Im facing the same problem, only i dont use comodo. I could connect to my wifi with my phone but not with my laptop. Tried pinging google but connection is there and even trying ipconfig /release and ipconfig /renew, still getting the same “establishing secure connection” on “any” sites, then err times out after couple of secs. But connection between phone and wifi is perfect. Had this trouble twice now.

    • Unfortunately, I can’t help you on this as there are a range of things that can go wrong. The basic solution is that you should look for the programs installed on your computer that are messing with how Chrome handles the secure connections (assuming that you are able to connect to the website using other browsers).

  3. My computer doesn’t have Comodo installed, and doesn’t have a certsentry.dll file, but is still having issues with ‘establishing secure connection’. The connection I’m using is an Xfinity hotspot, and I’ve been having this problem ever since I started using this connection. I’m also getting lots of messages about ‘resolving host’, and the connection has a tendency to disconnect me without warning. What can I do to fix this?

    • I have the same “resolving host” and “establishing secure connection” issues – very difficult to get anything done on my laptop anymore. I don’t have Comodo installed. Getting desperate!

  4. I had the slowness issue and resolved it.
    -MacBook Air
    -Non-admin account
    -Parental controls enabled

    Issue: Chrome would not work with any google sites. Others worked fine. Chrome worked fine with my admin account.

    Solution: removed mac’s parental controls and the problem was solved.

  5. This issue started a few days ago in CHROME only , “establishing secure connection” – sites load for a minute and eventually arrive. There is nothing to help , time to start using FireFox. Google Chrome is no longer a viable browser.

  6. I noticed that it begins to issue “establishing secure connection” if I install Data Saver extension. Solved the problem uninstalling it.

Comments are closed.