Chrome keeps throwing ERR_SSL_PROTOCOL_ERROR on certain sites

If it's only certain sites, check the clock first. A PC date that's wrong by even a day breaks SSL on a lot of sites and this is the most common cause by far. After that: 1. try the site in an incognito window, if it works there an extension is the problem 2. antivirus with 'HTTPS scanning' or 'web shield' turned on, switch that off and test 3. Internet Options (search it in Start) > Content > Clear SSL state If the same sites fail on your phone too, it's not you, the site has a broken certificate setup.