Bitdefender says Pagespeed-mod.com certificate expired. Its been blocking www.pagespeed-mod.com for days now whenever I'm browsing the web. I use Windows 10 and Chrome browser. My system date/time is correct. I've googled the issue and can't find anything except issues for servers. I'm not running a webserver. It doesn't seem to be happening to anyone else. I have a feeling it will be embarrassingly simple....
I tried resetting my date/time, rebooting, uninstalling the last thing I installed (a USB/serial driver) restarting Chrome, restarting the PC...