Build 29558.1000: Windows Insider Experimental Channel, March 2026. Console image support and Azure Virtual Desktop authentication fix

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• This build includes platform changes as development moves to a new active development build.¹

For: Insiders with the latest-updates toggle on

• The original Console rendering engine can display bold text.²

For: Insiders with the latest-updates toggle on

• Accessibility support is updated to work better with assistive technologies.³
  The legacy MSAA integration and parts of UI Automation support are rewritten.

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• The Console's automatic view adjustment is enabled by default only when processing commands that control terminal behavior.⁴
  Snap-on-input is enabled by default only when VT processing is enabled.

For: Insiders with the latest-updates toggle on

• The Console more reliably adjusts its view as commands and output appear in PowerShell and Linux environments on Windows.⁵
  Improves snap on input/output in WSL and PowerShell.

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• Scrolling text is faster in some situations, by up to about 10 times.⁶
  Improves scrolling text performance by up to ~10x in some scenarios.

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• The F7 history window and F2 and F4 line-editing windows are more compatible with screen readers, assistive technologies, and other terminal emulators.⁷

For: Insiders

• Configuring power options in Settings > System > Power & Battery is faster.⁸

For: Insiders who use the command

• You can specify a volume path containing spaces when the path is enclosed in quotation marks.⁹
  For example: chkdsk "C:\My Volume\SD Card".

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• Some characters are no longer dropped when you paste text that the output encoding cannot represent.¹⁰
  Fixes dropped characters when the output code page cannot represent pasted characters.

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• Some clipboard text is no longer mistranslated when Windows turns it into numeric-keypad input.¹¹
  Avoids mistranslating Codepage 936 text when generating Alt + Numpad events for clipboard content.

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• Copying a rectangular text selection through Edit > Mark works again.¹²
  Fixes rectangular copy via Edit > Mark.

• Connecting to Azure Virtual Desktop no longer produces the authentication error reported in recent Canary builds.¹³

For: Insiders who use Group Policy Editor

• An unexpected error message no longer appears when you open Group Policy Editor.¹⁴
  Removes an unexpected error message reported in the previous two flights.

For: Insiders with the latest-updates toggle on

• An optional graphics-based rendering mode gives the Console another way to draw its contents.¹⁵
  Enable the optional Atlas/Direct3D rendering path by setting HKCU\Console\UseDx to DWORD 1.

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• You can search Console text using patterns, rather than only matching a simple string.¹⁶
  The Find dialog supports regular expressions.

For: Insiders with the latest-updates toggle on

• Terminal applications can use a supported terminal command to write selected text to the clipboard.¹⁷
  Adds OSC 52 (Manipulate Selection Data) support for writing selection data to the clipboard.

For: Insiders with the latest-updates toggle on

• The Console can display images within its text output, allowing command-line tools to show things such as application icons.¹⁸
  Adds support for Sixel-based images.