Some specific websites won't load, others do

Windows version related : Windows 10 Home, Version 22H2 - build nr: 19045.4291

Hardware: Dell Latitude E6540 laptop

Please help me find out how to rectify the faulty operation as desbribed below :

Problem statement:
Certain websites won't load in any browser ( Chrome, Ms Edge, Opera , .... ) These sites, however,
- could be opened seamlessly in the past on the laptop in subject;
- can now be opened properly on all other computers, smart phones using the same local network ( same router )

Examples: The following sites are blocked consequently :
- Expert Microsoft Help, with all of the Microsoft Applications from Excel programming, Access training to our free Microsoft VBA Forums ,
- REINER SCT - en - Chipkartenleser fur sicheres Onlinebanking, Zeiterfassung, Zutrittskontrolle und Personalverwaltung,
- Kártyaolvasó - e-személyi olvasó, RFID chipkártyaolvasó, webshop, vásárlás hivatalos magyarországi forgalmazótól ,
- LastPass | Something went wrong,
- Medtronic

(Note: for some reason this field here shows site description rather than the URL I entered )
Those URLs fail to show content in a consequent manner: the ones that get blocked once, will get blocked all the time, whereas all other websites that once open properly , will get loaded any other time.

The websites that won't load demonstrate a circled "i" symbol at the address bar, pls see attachment for illustration

It is irrelevant from this aspect whether the websites use HTTP:// or HTTPS:// protocol, the faulty or proper behaviour is independent from that protocol.

In addition:
- installed applications like Spotify do not get connected to the server, the app's user interface remains idle.
- Ms Outlook mail client fails to send messages, they get stuck in.


What I tried so far to avert it:


Windows device manager : Network adapter drivers checked for updates: all are up-to-date

Switched the router off and back on. ( 200 Mbit/s broadband connection confirmed )

disabled, then enabled network adapter drivers ( see attachment)

cmd --> ipconfig /flushdns

cleared the cache of the browsers

checked router configuration: OK

checked if any url is set to be blocked: none

Checked MS Defender firewall: no blocking set ( currently no other firewall is installed )

disabled browser extensions


Thank you for your time and efforts.

Hi, based on your screenshot:

Connection not private/secure

Begs the question as to why you only see this on 1 PC.

See that link for a few suggestions as to what to try.

Thank you dalchina,

Just read the content of the proposed link. These steps have already been performed by me. No improvement experienced in result.

Additional findings :

Checked the DNS settings to see if the name resolving function fails, which has so far been set to automatic access from service provider.
I 've updated it to Google's name server --> 8.8.8.8 and 8.8.4.4 ( see attachment ) No improvement seen.

Check settings here:

Do you perhaps have some rogue entries in your Hosts file?

If you create a new user account for test purposes (delete it afterwards), do you see the same problem?

You might try:

Please see SSL suggestion in my post, amended as you posted.

From my " Admin local " account same problem persists.

Certificates are completely unknown to me.

After browsing through the cloudfare website my first understanding is, that such certificates are designed to make use of by website owners, not by sheer internet users. Am I wrong ?

I wonder why I may want to innovate a paid version of certificate if I seamlessly accessed the internet for many years on my Windows platform ?