[Bug] MSIX Installation Timeout: AddPackage failed after 5 minutes

[kailung91]

Bug Description
Please share this log with us.
2026/05/07 11:11:12.991512 Elevated process exited with code 1
2026/05/07 11:11:12.991512 Elevation failed: elevated installer exited with code 1
2026/05/07 11:11:12.991512 ERROR dialog (with log path): Administrator access is required to install Claude with full features. You can try again or install without Cowork.
2026/05/07 11:15:40.593119 Log file: F:\Temp\ClaudeSetup.log
2026/05/07 11:15:40.621482 === Claude Setup 5095e7dddcba4ca974d351ee397e17d204814f07 started ===
2026/05/07 11:15:40.621482 AllowAllTrustedApps not found (sideloading assumed enabled): The system cannot find the file specified.
2026/05/07 11:15:40.622015 Windows edition: Professional
2026/05/07 11:15:40.622596 WARNING: CoworkVMService already exists (potential conflict)
2026/05/07 11:15:40.622596 Windows version: 10.0.19045
2026/05/07 11:15:40.622596 Native arch: x64
2026/05/07 11:15:40.622596 Elevation type: Limited
2026/05/07 11:15:40.622596 Is elevated: false
2026/05/07 11:15:40.622596 Sideloading enabled: true
2026/05/07 11:15:40.622596 S Mode: false
2026/05/07 11:15:40.623102 Conflicting service: true
2026/05/07 11:15:40.623102 Running in non-elevated context
2026/05/07 11:15:40.623165 User can elevate — installing MSIX directly
2026/05/07 11:15:40.662401 Splash: 400x300, 8 frame(s), animated=true
2026/05/07 11:15:40.662401 System DPI: 96 (scale: 100%)
2026/05/07 11:15:40.748766 MSIX URL: https://api.anthropic.com/api/desktop/win32/x64/msix/latest/redirect
2026/05/07 11:15:40.754702 Downloading MSIX to F:\Temp\Claude-3180468601.msix
2026/05/07 11:15:40.772033 proxy: WinHttpGetProxyForUrl("https://api.anthropic.com/api/desktop/win32/x64/msix/latest/redirect"): winapi error #12180
2026/05/07 11:15:41.090468 proxy: WinHttpGetProxyForUrl("https://downloads.claude.ai/releases/win32/x64/1.6259.1/Claude-5095e7dddcba4ca974d351ee397e17d204814f07.msix"): winapi error #12180
2026/05/07 11:15:45.887822 Download progress: 10% (24345872 / 243297743 bytes)
2026/05/07 11:15:50.241672 Download progress: 20% (48660112 / 243297743 bytes)
2026/05/07 11:15:54.274970 Download progress: 30% (72989600 / 243297743 bytes)
2026/05/07 11:15:58.907999 Download progress: 40% (97320224 / 243297743 bytes)
2026/05/07 11:16:03.196013 Download progress: 50% (121650272 / 243297743 bytes)
2026/05/07 11:16:07.890427 Download progress: 60% (145979760 / 243297743 bytes)
2026/05/07 11:16:12.973377 Download progress: 70% (170310384 / 243297743 bytes)
2026/05/07 11:16:18.368798 Download progress: 80% (194639872 / 243297743 bytes)
2026/05/07 11:16:22.584556 Download progress: 90% (218970496 / 243297743 bytes)
2026/05/07 11:16:26.624338 Download progress: 100% (243297743 / 243297743 bytes)
2026/05/07 11:16:26.856511 Download complete: 243297743 bytes, SHA256: d4fcf67b2a02a340e2f855d13affe5f134c56214eb7fadcce9715f12a5cbc27e
2026/05/07 11:16:26.858684 Download complete
2026/05/07 11:16:26.865366 Self-elevating: C:\Users\kailung\Downloads\Claude Setup (1).exe --elevated --msix-path "F:\Temp\Claude-3180468601.msix" --log-path "F:\Temp\ClaudeSetup.log"
2026/05/07 11:16:29.608788 Waiting for elevated process to complete...
2026/05/07 11:16:29.615015 Log file: F:\Temp\ClaudeSetup.log
2026/05/07 11:16:29.634110 === Claude Setup 5095e7dddcba4ca974d351ee397e17d204814f07 started ===
2026/05/07 11:16:29.634110 AllowAllTrustedApps not found (sideloading assumed enabled): The system cannot find the file specified.
2026/05/07 11:16:29.634110 Windows edition: Professional
2026/05/07 11:16:29.635144 WARNING: CoworkVMService already exists (potential conflict)
2026/05/07 11:16:29.635144 Windows version: 10.0.19045
2026/05/07 11:16:29.635144 Native arch: x64
2026/05/07 11:16:29.635144 Elevation type: Full
2026/05/07 11:16:29.635144 Is elevated: true
2026/05/07 11:16:29.635144 Sideloading enabled: true
2026/05/07 11:16:29.635144 S Mode: false
2026/05/07 11:16:29.635144 Conflicting service: true
2026/05/07 11:16:29.635144 Running in elevated context
2026/05/07 11:16:29.635144 Installing MSIX from F:\Temp\Claude-3180468601.msix (all-users: false)
2026/05/07 11:16:29.668065 Splash: 400x300, 8 frame(s), animated=true
2026/05/07 11:16:29.669065 System DPI: 96 (scale: 100%)
2026/05/07 11:16:29.742066 Verifying Authenticode signature on F:\Temp\Claude-3180468601.msix
2026/05/07 11:16:32.579721 WinVerifyTrust: MSIX signature is valid
2026/05/07 11:16:33.327616 Signature verified: MSIX signer matches bootstrapper
2026/05/07 11:16:33.327616 Squirrel process prefix: c:\users\kailung\appdata\local\anthropicclaude
2026/05/07 11:16:33.327616 Checking for running Squirrel Claude processes...
2026/05/07 11:16:33.335014 No Squirrel Claude processes found
2026/05/07 11:16:33.335014 Removing conflicting CoworkVMService...
2026/05/07 11:16:33.335014 WARNING: failed to remove conflicting service: could not open CoworkVMService: Access is denied.
2026/05/07 11:16:33.335014 Checking for existing Claude MSIX packages...
2026/05/07 11:16:33.353756 Removing: Claude_1.5354.0.0_x64__pzs8sxrjxfjjc
2026/05/07 11:16:33.622796 WARNING: Remove failed for Claude_1.5354.0.0_x64__pzs8sxrjxfjjc: RemovePacka…
Note: Content was truncated.

[github-actions]

Found 3 possible duplicate issues:

1. [BUG] MSIX AddPackage hangs/times out on Windows 11 Build 26200.8039 — was working on same build days earlier #37443
2. [BUG] Claude Desktop Windows installer fails with AddPackage HRESULT 0x80073CF6 after an earlier "successful" install left the package in an inconsistent state #49917
3. [BUG] Claude Desktop update fails with 0x80073CF6 when CoworkVMService is running (Windows) #49655

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[github-actions]

This issue has been automatically closed as a duplicate of #37443.

If this is incorrect, please re-open this issue or create a new one.

🤖 Generated with Claude Code

[github-actions]

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.