Windows error "SmartScreen can't be reached right now" on IPv6-only network


If you're reading this, chances are you've spent hours scouring the internet for solutions to a frustrating tech problem. You've probably tried the same "fixes" repeated on every blog and forum: 
  • Toggle SmartScreen on/off
  • Check your Internet
  • Check your proxy settings
  • Create a new Windows user
 And yet, nothing seems to work.

In my case, it was resolved by switching from my IPv6-only network to IPv4. It seems Microsoft's service is currently running on an IPv4 endpoint.



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