KB4493784 released for Windows Update Outage - ISP DNS Issue [Fix in Link]

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Windows Update went down in late January due to what eventually proved to be a DNS issue encountered by several ISPs, with customers in several regions, including the United States and the UK, no longer being able to update their devices.

In February, Microsoft explained that it was working with partners to resolve the problem and instructed users to get in touch with their ISPs to flush their DNS records.

In a March 8 update, the company points users to KB4493784, a new knowledge base article that includes information on how to resolve the problem hitting Windows Update.

Via Microsoft Releases New Details on Windows Update Outage

Troubleshooting:

https://support.microsoft.com/en-us/help/4493784/isolated-isp-dns-issues-preventing-connections-to-windows-update-servi