Also the .NET updates from August are causing problems. Microsoft is investigating PDF printing issues that occur after installation.
This unhandled exception occurs primarily because the .NET Framework application cannot write essential data to the disk. You are most likely to encounter this error ...
Windows Report on MSN
Windows printing is broken after Microsoft’s August updates
Microsoft confirms August 2026 .NET updates can break printing and PDF export in WPF apps, with only a temporary workaround available.
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