An update - not expecting a solution as heaps of googling and comparing with other OK comps has been fruitless. But wouldn't say no to suggestions!
I updated win 10 to 1803 and nothing had changed.
I then clean installed from a USB drive and, guess what, nothing changed!! Same using Chrome Canary.
The problem is security access to google sites. If quic is enabled I get quic errors and no page displayed. If I disable quic, I get long "Establishing secure connection" msge then a page fail. So, both methods of establishing a security handshake are failing.
Having spent the best part of two days trying to figure out why 1 of 4 comps should be different with the same OS and chrome browser I am now stumped. Cross checking TLS tick boxes reveals no apparent difference.
Can't get my head around this weird situation. I can't stand being beaten so I will keep trying but this is a real doozy.
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