Okay, I have an important update on this. I solved the google.com privacy error by deleting all SSL certificates that were issued by DigiCert Global Root G1A. As far as I understand, these are the wrong certificates. google.com works fine now. But while digging a little deeper on this, I discovered that the real problem lies with some kind of malware that I'm now struggling to remove from my laptop.

Apparently there's a proxy script running on my laptop that redirects to http://127.0.0.1:86/. This address downloads a file called "download" which has some code that basically sets up the proxy whenever I visit Google, YouTube, Ebay, Amazon, etc.

So far, I've:

• deleted the 127.0.0.1:86 in all entries in regedit.
• deleted the "download" file everywhere on my laptop
• used Malwarebytes' Adwcleaner to remove malware
• used HitmanPro to delete malware

These help in removing some malware, but it fails removing in the proxy script. Every time I browse, this darn proxy activates itself again. Anyone has any suggestions here? I'm at a loss and might completely reformat my PC if required.

 

I'd begin by resetting all browsers to their defaults and forcing a full reboot or a full shutdown and a fresh boot.

How to Reset Default Settings in an Internet Browser

Instructions for how to reset and restore the default settings in an Internet browser.

www.computerhope.com

 

Thank you for your reply, satrow. So I managed to fix it by changing my proxy settings to "auto-detect settings" and changing a few regedit settings. The one ultimately that did it was changing the group policy settings so only one user could change things (and that user was me). No more 127.0.0.1:86 problems!