[BUG] Claude app failed to reinstall after App crash

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?

critical failure at App installation after sudden closure and impossibility to relaunch the app
Message was : reinstall from site

What Should Happen?

Claude failed to install after App crash

Error Messages/Logs

2026/07/27 08:06:03.300000 Log file: C:\Users\cdats\AppData\Local\Temp\ClaudeSetup.log
2026/07/27 08:06:03.632426 === Claude Setup 03c61d06f8e01a4db2273b9514e225f21d2ba62e started ===
2026/07/27 08:06:03.632426 AllowDevelopmentWithoutDevLicense found with value: 1
2026/07/27 08:06:03.632935 Windows edition: Professional
2026/07/27 08:06:03.634026 WARNING: CoworkVMService already exists (potential conflict)
2026/07/27 08:06:03.634026 Windows version: 10.0.19045
2026/07/27 08:06:03.634026 Native arch: x64
2026/07/27 08:06:03.634026 Elevation type: Limited
2026/07/27 08:06:03.634026 Is elevated: false
2026/07/27 08:06:03.634559 Sideloading enabled: true
2026/07/27 08:06:03.634559 S Mode: false
2026/07/27 08:06:03.634559 Conflicting service: true
2026/07/27 08:06:03.634559 Running in non-elevated context
2026/07/27 08:06:03.634559 User can elevate — installing MSIX directly
2026/07/27 08:06:03.670189 Splash: 400x300, 8 frame(s), animated=true
2026/07/27 08:06:03.670189 System DPI: 144 (scale: 150%)
2026/07/27 08:06:03.752978 MSIX URL: https://api.anthropic.com/api/desktop/win32/x64/msix/latest/redirect
2026/07/27 08:06:03.754592 Downloading MSIX to C:\Users\cdats\AppData\Local\Temp\Claude-4166103972.msix
2026/07/27 08:06:03.788710 proxy: WinHttpGetProxyForUrl("https://api.anthropic.com/api/desktop/win32/x64/msix/latest/redirect"): winapi error #12180
2026/07/27 08:06:04.171816 proxy: WinHttpGetProxyForUrl("https://downloads.claude.ai/releases/win32/x64/1.24012.9/Claude-03c61d06f8e01a4db2273b9514e225f21d2ba62e.msix"): winapi error #12180
2026/07/27 08:06:08.903458 Download progress: 10% (25870144 / 258383876 bytes)
2026/07/27 08:06:16.029963 Download progress: 20% (51690560 / 258383876 bytes)
2026/07/27 08:06:23.013463 Download progress: 30% (77527936 / 258383876 bytes)
2026/07/27 08:06:29.874233 Download progress: 40% (103365872 / 258383876 bytes)
2026/07/27 08:06:36.312650 Download progress: 50% (129202672 / 258383876 bytes)
2026/07/27 08:06:42.797811 Download progress: 60% (155040048 / 258383876 bytes)
2026/07/27 08:06:50.688298 Download progress: 70% (180877984 / 258383876 bytes)
2026/07/27 08:06:57.858964 Download progress: 80% (206714784 / 258383876 bytes)
2026/07/27 08:07:05.530080 Download progress: 90% (232552160 / 258383876 bytes)
2026/07/27 08:07:12.544586 Download progress: 100% (258383876 / 258383876 bytes)
2026/07/27 08:07:12.546228 Download complete: 258383876 bytes, SHA256: c7d61479f06a3490bd2598405aa95a428abb9fe31ed97f9e0a1fba7cd2745fe2
2026/07/27 08:07:12.548380 Download complete
2026/07/27 08:07:12.555381 Self-elevating: C:\Users\cdats\Downloads\Claude Setup.exe --elevated --msix-path "C:\Users\cdats\AppData\Local\Temp\Claude-4166103972.msix" --log-path "C:\Users\cdats\AppData\Local\Temp\ClaudeSetup.log"
2026/07/27 08:07:16.653011 Waiting for elevated process to complete...
2026/07/27 08:07:16.679862 Log file: C:\Users\cdats\AppData\Local\Temp\ClaudeSetup.log
2026/07/27 08:07:16.753722 === Claude Setup 03c61d06f8e01a4db2273b9514e225f21d2ba62e started ===
2026/07/27 08:07:16.753722 AllowDevelopmentWithoutDevLicense found with value: 1
2026/07/27 08:07:16.753722 Windows edition: Professional
2026/07/27 08:07:16.755389 WARNING: CoworkVMService already exists (potential conflict)
2026/07/27 08:07:16.755389 Windows version: 10.0.19045
2026/07/27 08:07:16.755389 Native arch: x64
2026/07/27 08:07:16.755389 Elevation type: Full
2026/07/27 08:07:16.755389 Is elevated: true
2026/07/27 08:07:16.755946 Sideloading enabled: true
2026/07/27 08:07:16.755946 S Mode: false
2026/07/27 08:07:16.755946 Conflicting service: true
2026/07/27 08:07:16.756006 Running in elevated context
2026/07/27 08:07:16.756006 Installing MSIX from C:\Users\cdats\AppData\Local\Temp\Claude-4166103972.msix (all-users: false)
2026/07/27 08:07:16.789688 Splash: 400x300, 8 frame(s), animated=true
2026/07/27 08:07:16.789688 System DPI: 144 (scale: 150%)
2026/07/27 08:07:16.842630 Verifying Authenticode signature on C:\Users\cdats\AppData\Local\Temp\Claude-4166103972.msix
2026/07/27 08:07:19.829111 WinVerifyTrust: MSIX signature is valid
2026/07/27 08:07:20.734148 Signature verified: MSIX signer matches bootstrapper
2026/07/27 08:07:20.737373 Extracted family name from MSIX manifest: Claude_pzs8sxrjxfjjc
2026/07/27 08:07:20.737373 Squirrel process prefix: c:\users\cdats\appdata\local\anthropicclaude\
2026/07/27 08:07:20.737373 Checking for running Squirrel Claude processes...
2026/07/27 08:07:20.744849 No Squirrel Claude processes found
2026/07/27 08:07:20.744849 Removing conflicting CoworkVMService...
2026/07/27 08:07:20.745377 WARNING: failed to remove conflicting service: could not open CoworkVMService: Access is denied.
2026/07/27 08:07:20.745377 Checking for existing Claude MSIX packages...
2026/07/27 08:07:20.765633 Removing: Claude_1.24012.9.0_x64__pzs8sxrjxfjjc
2026/07/27 08:07:20.775315 Windows rejected data-preserving removal for Claude_1.24012.9.0_x64__pzs8sxrjxfjjc (0x80073CFA, requires developer mode); relying on in-place update
2026/07/27 08:07:20.799248 Removing (user): Claude_1.24012.9.0_x64__pzs8sxrjxfjjc
2026/07/27 08:07:20.806746 Windows rejected data-preserving removal for Claude_1.24012.9.0_x64__pzs8sxrjxfjjc (0x80073CFA, requires developer mode); relying on in-place update
2026/07/27 08:07:20.806746 Installing MSIX: C:\Users\cdats\AppData\Local\Temp\Claude-4166103972.msix
2026/07/27 08:07:20.806746 Standard install (not split-account), using AddPackage
2026/07/27 08:07:20.806746 Installing via AddPackage (current-user)...
2026/07/27 08:07:23.839719 MSIX installation failed: AddPackage failed: AddPackage failed with HRESULT 0x80073CF9
2026/07/27 08:07:23.839719 ERROR dialog (opening log): Installation failed: AddPackage failed: AddPackage failed with HRESULT 0x80073CF9

Please share this log with us.
2026/07/27 08:07:44.886485 Elevated process exited with code 1
2026/07/27 08:07:44.886485 Elevation failed: elevated installer exited with code 1
2026/07/27 08:07:44.900911 ERROR dialog (with log path): Administrator access is required to install Claude with full features. You can try again or install without Cowork.

Steps to Reproduce

see description

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

not applicable for this issue

Platform

Other

Operating System

Windows

Terminal/Shell

Other

Additional Information

_No response_