I have a Windows 10 Pro system, upgraded from 8.1 (or .2). It is a Dell desktop PC. The certificate store indicates that DST Root CA X3 has been revoked by its certification authority. I also have a Surface Pro 2017 with Windows 10 Pro. That machine indicates that certificate is fine, has not been revoked.
I discovered this problem troubleshooting an issue on my desktop. Chrome and the new Chromium Edge browsers will not allow access to sites using the Let's Encrypt certificate. Normal Edge has no problem. So for a long time I've simply used Edge. It works, and I never get an invalid cert problem.
I've attached a screen shot that shows the cert path and browser page displays for one site (of many).
Initially I thought it was a browser problem, but now I think it is a multi-factor problem. For one thing, my desktop is reporting a cert status that is different than another machine. For another, Edge doesn't appear to care or acknowledge the status of a revoked cert on the machine.
I need to fix the cert on my desktop. I tried exporting and copying from my Surface Pro, but that didn't solve the problem. Any suggestions?