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Full Fix: This server could not prove where its security certificate is from

7 min. read

Updated onOctober 4, 2023

updated onOctober 4, 2023

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This server could not prove that it is [Server Name] its security certificate is from [missing_subjectAltName]. If you get this prompt, do not worry, Windows Report will show you how to work around it.

Many Windows users reported getting the “this server could not prove that it is ….its security certificate is from” prompt on their web browsers most especially on Google Chrome, Mozilla Firefox, and IE web browser. This error prevents users from accessing websites bringing them to a stalemate.

Meanwhile, this error prompt may be caused by several factors such as a hijacker intercepting your internet connection, browser misconfiguration, invalid date and time, and other browser-related errors. Hence, the Windows Report team has compiled the best applicable solutions to fix this problem.

Fix server security certificate problems

Solution 1: Set Date and Time settings

Incorrect dates and times can cause the web browser to assume theSSL certificates are expired or outdated. Therefore, you need to set time automatically on your Windows PC. Here’s how to set time automatically:

If the prompt persists, proceed to the next solution.

Solution 2: Change your Internet network

Some Windows users were able to bypass the error by simply changing their Internet connection. If you used a public Wi-Fi network, disconnect it, and use another Internet connection such as a modem or private LAN to access the website.

Don’t forget toprotect your device when using public Wi-Fi networks. You can use any of theanti-tracking toolsto protect your PC as well.

Solution 3: Scan PC for malware

Another reason for this server certificate alert is due tomalware infection. Hence, the ideal step afterwards is to use remove the malware from your Windows PC by using MalwarebytesAdwCleaner. This program is a free utility that will scan andremove malware and PUPsfrom your computer. Here’s how to download, install, and use MalwarebytesAdwCleaner on your Windows PC:

Note: Another efficient alternative tool can help remove unwanted programs that may affect your system due to malware infection. To eliminate potential risky viruses or intrusive programs, it is better to considerPotentially Unwanted Programs removal tools.

After removing the suspected malware from your Windows PC, we do recommend that you carry out this operation:

Run a full system scan

Run a full system scan on your PC to remove every possible virus corruption. You can try anythird-parties antivirus softwareavailable for Windows PC.

We do recommend that you use Windows’ built-in antivirus,Windows Defender. Here’s how to run a full system scan on Windows 10:

Alternatively, we strongly suggest you to check out some of the best antivirus software for your Windows PC and install them on your computer. Some third-party antivirus programs such as BullGuard, BitDefender, etc are ideal for virus removal.

Solution 4: Use CCleaner

Alternatively, you can useCCleanerto scan, fix, and clean bad system files most especially thecorrupted filesresponsible for the error problem. Here’s how to do this:

Moreover, you can best use this advanced program to erase corrupted files associated with your browser or delete cookies and junk files from your system.

CCleaneris totally safe and can also help the users to eliminate browser trackers or free up the storage in a very short time.

Solution 5: Reset your web browser

Also, you may consider resetting your web browser to its default state. This process will get rid of invalid settings, add-ons, or injected browser settings causing “this server could not prove that it is […] its security certificate is from […]” error message. You can reset your Google Chrome web browser by following these steps:

Solution 6: Update your web browser

Also, you may be using an older Google Chrome version which could be responsible for “this server could not prove that it is […] its security certificate is from […]” prompt. Therefore, you should update your web browser to resolve this issue. Here’s to update Google Chrome web browser:

Solution 7: Manually assign DNS server

Here’s how to manually assign DNS server:

Solution 8: Run Windows Update

Finally, you should considerupdating your Windows OS. Frequent Microsoft updates contain security patches; this can fix any trending issues and especially “this server could not prove that it is […] its security certificate is from […]” error. Here’s how to update your Windows OS:

In conclusion, we hope you find this post useful in solving “this server could not prove that it is its security certificate is from” prompt on your Windows PC.

However, you may consider using an alternative web browser such as Mozilla Firefox, Microsoft Edge, Opera, Pale Moon, and Internet Explorer. Do you know of any other solution that we didn’t mention? Let us know by commenting below.

Full Fix: This server could not prove where its security certificate is from#

Fix server security certificate problems#

Solution 1: Set Date and Time settings#

Solution 2: Change your Internet network#

Solution 3: Scan PC for malware#

Solution 4: Use CCleaner#

Solution 5: Reset your web browser#

Solution 6: Update your web browser#

Solution 7: Manually assign DNS server#

Solution 8: Run Windows Update#