Why would one and only one web address not resolve?

[RonSwanson]

At this point, I'd recommend a Wireshark trace.

 

[Rickster]

Has op ran a virus scan and anti malware?

 

[Geoff.D]

Has op ran a virus scan and anti malware?

Ja first action. But it is only what windows security offers.

 

[Rickster]

Ja first action. But it is only what windows security offers.

Install and run malwarebytes.