.NET Framework Archives

Winsage

August 24, 2026

Microsoft shares workaround after Windows KB5120708, KB5120705, KB5120710 break printing

Microsoft released its monthly Patch Tuesday security updates, which included dynamic updates and new .NET Framework versions. Users of Windows 11, Windows 10, and Windows Server are experiencing printing issues after installing the August 2026 .NET Framework cumulative updates, particularly with Windows Presentation Foundation (WPF) applications that fail during printing tasks or when generating PDF or XPS documents. The problems are linked to specific fonts, notably Calibri, and may result in a System.IO.FileFormatException. Microsoft has provided a temporary workaround involving an AppContext switch, but enabling this switch disables certain security protections from the August 2026 update, potentially exposing applications to vulnerabilities. No permanent fix or timeline for one has been provided.

Winsage

February 11, 2026

Microsoft rolls out Windows 11 26H1, but you can’t have it

Microsoft has released Windows 11 26H1, which is specifically designed for devices with Qualcomm Snapdragon X2 hardware and is not intended for most users. This version will not be available as an in-place update, will not have a successor (26H2), and will not support hotpatch updates. IT administrators are advised to use Windows 11 versions 24H2 and 25H2 for enterprise deployment. The release marks the retirement of the .NET Framework 3.5 as a Windows Feature on Demand optional component, effective with Windows 11 version 26H1. Support for .NET Framework 3.5 will end on January 9, 2029, prompting developers to prioritize migration efforts. Only devices with Snapdragon X2 hardware running Windows 11 26H1 will be affected by this change.