So, it's been a couple of days since I start having this problem with my browser, which when I use a new tab to search for literally anything, I get by the looks of it an SSL problem, that gives me "your connection is not private" or something. And it only happens with Google!

Actually, if I open Google's main page and search there it works (although pretty slow till I get the results), and if I search for any Google related stuff (like Gmail or Google Drive), I receive this error I mentioned.

It only happens on my PC and in OperaGX browser. And it's connected through cable.

I have my laptop (which I'm using to write this) and have the same browser and version that in my PC, and no matter if I connect through cable or wi-fi, it works fine.

So, I have two guesses:

1. The issue is caused by the browser and my PC.
2. The problem is in my ISP, but that is unlikely since everything works fine if I use my laptop or smartphone to search for something.

I want to rule out if there might be anything wrong with the browser, because I use it more than 2 years and this never happened. Already did full network reset on my PC, reinstalled the browser, reset the router, ran Ccleaner and Windows Defender, but nothing seems to help.

PS: I had to do an OS reset on my PC 3 days ago, but I really don't think this would be the reason. I'm on phone with my ISP to see if I can find something, but I would like to get some answer here.