[BUG] Claude Desktop (Windows) — taskbar icon renders as solid black square

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Product: Claude Desktop, Windows
Version: Version 1.40609.0 (f65e38)
OS build: 26200.9106

Symptom:
The Claude Desktop icon pinned to the Windows taskbar renders as a solid black square with no visible glyph. This is isolated to the taskbar — the icon renders correctly in Task Manager's process list and in the Start menu, which points to a defect specific to the taskbar icon resource rather than a corrupted install.

Troubleshooting already attempted, no effect:

• Matching in-app Appearance theme to Windows taskbar light/dark mode
• Unpinning and re-pinning the app from the taskbar
• Rebuilding the Windows icon cache (IconCache.db / iconcache_*.db + explorer restart) - Updating to the latest Claude Desktop version
• Uninstall/reinstall

Likely related (not identical) prior reports on the public tracker:

• anthropics/claude-code#59477 — taskbar icon pixelated due to missing MSIX Square44x44Logo targetsize-NN asset variants
• anthropics/claude-code#72622 — tray icon invisible due to theme/ taskbar contrast mismatch

Given Task Manager and Start Menu icons are unaffected, this looks like the taskbar-specific targetsize asset set is either missing or corrupted in this build, causing a render failure to a solid black tile rather than the pixelation reported in #59477.

What Should Happen?

Taskbar should show normal "orange spark" Claude icon.

Error Messages/Logs

Steps to Reproduce

1. Install Claude for Windows
2. Run Claude for Windows
3. Look at the icon in Taskbar

Claude Model

None

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

1.40609.0 (f65e38)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

_No response_