Can't access foreign websites such as bbc.com

Try setting up another admin user account to see if the same problem continues. Please post back on whether or not this worked. Also try the Safe Mode. Please post back on whether or not this worked.

Isolating an issue by using another user account 

Safe Mode - About

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Etrecheck – System Information

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Is it possible it is censored? When I do a search for "Vietnam web censorship" from the USA I see multiple recent articles about some web sites being blocked from there.