September 11, 2018

Napkin Notes: .NET Framework 4.7.1 Errors in Windows 10 RS5 17755+

A regression in Windows 10 Redstone 5 builds 17755 and above will result in apps falsely thinking .NET Framework 4.7.1 is not installed/present.

This is due to a missing registry key: HKLM\SOFTWARE\Microsoft.NETFramework\v4.0.30319\SKUs.NETFramework,Version=v4.7.1

Microsoft is tracking this bug as 18790461. It's fixed in Redstone 5 Build 17759.