[BUG] Windows: MSIX updates leave orphaned package versions; Deleted-folder cleanup fails with ERROR_OPLOCK_NOT_GRANTED (0x12C), blocking all installs with 0x80073CF6
Resolved 💬 1 comment Opened Jun 7, 2026 by Shahinyanm Closed Jul 13, 2026
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?
What's Wrong?
Every Claude Desktop update on my machine fails with "Another program is currently using this file" (related: #45400, #45896). Investigating deeper, I found the root state is worse than a transient lock:
C:\Program Files\WindowsApps contains 10 orphaned Claude package versions dating back to March 2026 — old-version cleanup has never succeeded on this machine.
AppX deployment log shows cleanup of the WindowsApps\Deleted\Claude_* staging folder repeatedly failing with error 0x12C (ERROR_OPLOCK_NOT_GRANTED) on resources.pak, v8_context_snapshot.bin, icudtl.dat.
While the package is stuck in this pending-deletion state, any AddPackage for the Claude package family fails with 0x80073CF6, so reinstalling is impossible without a reboot.
The AppX log shows the same 0x80073CF6 pattern on versions 1.3883, 1.4758, 1.6259, 1.11187 — i.e. this loop happens on every update and is only resolved by rebooting each time.
Likely contributing factor: CoworkVMService holds locks on the package directory during update (as described in #45400); after the failed swap the file locks/oplocks become orphaned at the filesystem level with no owning process.
Steps to Reproduce
Have Claude Desktop installed (MSIX) on Windows 11
Accept an in-app update / click Relaunch
Update fails with "Another program is currently using this file"
Uninstall via Remove-AppxPackage, attempt fresh install → AddPackage failed with HRESULT 0x80073CF6
Get-AppxLog shows 0x12C deletion failures in WindowsApps\Deleted\Claude_*
Environment
Windows 11 Pro, build 26200 (25H2)
Claude Desktop 1.11187.4.0 (attempted)
Killed cowork-svc.exe, disabled CoworkVMService via registry, used app Terminate/Repair/Reset — error persists; no Claude/cowork processes running, Resource Monitor shows no handle owner
What Should Happen?
Expected
Updater should stop/coordinate with CoworkVMService before swapping package files
Old package versions should be cleaned up after successful updates
Failed cleanup should not permanently block AddPackage for the package family
Error Messages/Logs
2026/06/07 12:01:35.497092 Log file: C:\Users\DoC\AppData\Local\Temp\ClaudeSetup.log
2026/06/07 12:01:35.497092 === Claude Setup 58400536f3ccde1cff9a129de6c3112dc8cb489a started ===
2026/06/07 12:01:35.497592 AllowAllTrustedApps not found (sideloading assumed enabled): The system cannot find the file specified.
2026/06/07 12:01:35.498092 Windows edition: Professional
2026/06/07 12:01:35.498592 Windows version: 10.0.26200
2026/06/07 12:01:35.498592 Native arch: x64
2026/06/07 12:01:35.498592 Elevation type: Limited
2026/06/07 12:01:35.498592 Is elevated: false
2026/06/07 12:01:35.498592 Sideloading enabled: true
2026/06/07 12:01:35.499092 S Mode: false
2026/06/07 12:01:35.499092 Conflicting service: false
2026/06/07 12:01:35.499092 Running in non-elevated context
2026/06/07 12:01:35.499092 User can elevate — installing MSIX directly
2026/06/07 12:01:35.514592 Splash: 400x300, 8 frame(s), animated=true
2026/06/07 12:01:35.515092 System DPI: 96 (scale: 100%)
2026/06/07 12:01:35.545690 MSIX URL: https://api.anthropic.com/api/desktop/win32/x64/msix/latest/redirect
2026/06/07 12:01:35.545690 Downloading MSIX to C:\Users\DoC\AppData\Local\Temp\Claude-3231372897.msix
2026/06/07 12:01:35.553690 proxy: WinHttpGetProxyForUrl("https://api.anthropic.com/api/desktop/win32/x64/msix/latest/redirect"): winapi error #12180
2026/06/07 12:01:35.938762 proxy: WinHttpGetProxyForUrl("https://downloads.claude.ai/releases/win32/x64/1.11187.4/Claude-58400536f3ccde1cff9a129de6c3112dc8cb489a.msix"): winapi error #12180
2026/06/07 12:01:40.698668 Download progress: 10% (22232928 / 222055920 bytes)
2026/06/07 12:01:45.363564 Download progress: 20% (44433072 / 222055920 bytes)
2026/06/07 12:01:49.946880 Download progress: 30% (66616848 / 222055920 bytes)
2026/06/07 12:01:54.593643 Download progress: 40% (88833376 / 222055920 bytes)
2026/06/07 12:01:59.219580 Download progress: 50% (111049920 / 222055920 bytes)
2026/06/07 12:02:03.943220 Download progress: 60% (133233680 / 222055920 bytes)
2026/06/07 12:02:08.444700 Download progress: 70% (155450208 / 222055920 bytes)
2026/06/07 12:02:13.124080 Download progress: 80% (177666752 / 222055920 bytes)
2026/06/07 12:02:17.815069 Download progress: 90% (199850512 / 222055920 bytes)
2026/06/07 12:02:22.331419 Download progress: 100% (222055920 / 222055920 bytes)
2026/06/07 12:02:22.332421 Download complete: 222055920 bytes, SHA256: 8d0d2d8bbbb8373bddf9ac548131bef3facbb70a26df10c69618aeb23c87c73b
2026/06/07 12:02:22.332919 Download complete
2026/06/07 12:02:22.338419 Self-elevating: C:\Users\DoC\Downloads\Claude Setup (2).exe --elevated --msix-path "C:\Users\DoC\AppData\Local\Temp\Claude-3231372897.msix" --log-path "C:\Users\DoC\AppData\Local\Temp\ClaudeSetup.log"
2026/06/07 12:02:22.496009 Waiting for elevated process to complete...
2026/06/07 12:02:22.502009 Log file: C:\Users\DoC\AppData\Local\Temp\ClaudeSetup.log
2026/06/07 12:02:22.502509 === Claude Setup 58400536f3ccde1cff9a129de6c3112dc8cb489a started ===
2026/06/07 12:02:22.503009 AllowAllTrustedApps not found (sideloading assumed enabled): The system cannot find the file specified.
2026/06/07 12:02:22.503009 Windows edition: Professional
2026/06/07 12:02:22.503509 Windows version: 10.0.26200
2026/06/07 12:02:22.503509 Native arch: x64
2026/06/07 12:02:22.504009 Elevation type: Full
2026/06/07 12:02:22.504009 Is elevated: true
2026/06/07 12:02:22.504009 Sideloading enabled: true
2026/06/07 12:02:22.504009 S Mode: false
2026/06/07 12:02:22.504009 Conflicting service: false
2026/06/07 12:02:22.504009 Running in elevated context
2026/06/07 12:02:22.504009 Installing MSIX from C:\Users\DoC\AppData\Local\Temp\Claude-3231372897.msix (all-users: false)
2026/06/07 12:02:22.520509 Splash: 400x300, 8 frame(s), animated=true
2026/06/07 12:02:22.520509 System DPI: 96 (scale: 100%)
2026/06/07 12:02:22.542554 Verifying Authenticode signature on C:\Users\DoC\AppData\Local\Temp\Claude-3231372897.msix
2026/06/07 12:02:23.149454 WinVerifyTrust: MSIX signature is valid
2026/06/07 12:02:23.429539 Signature verified: MSIX signer matches bootstrapper
2026/06/07 12:02:23.431039 Extracted family name from MSIX manifest: Claude_pzs8sxrjxfjjc
2026/06/07 12:02:23.431039 Squirrel process prefix: c:\users\doc\appdata\local\anthropicclaude\
2026/06/07 12:02:23.431039 Checking for running Squirrel Claude processes...
2026/06/07 12:02:23.440039 No Squirrel Claude processes found
2026/06/07 12:02:23.440039 Checking for existing Claude MSIX packages...
2026/06/07 12:02:23.457541 Installing MSIX: C:\Users\DoC\AppData\Local\Temp\Claude-3231372897.msix
2026/06/07 12:02:23.457541 Standard install (not split-account), using AddPackage
2026/06/07 12:02:23.457541 Installing via AddPackage (current-user)...
2026/06/07 12:02:32.461259 MSIX installation failed: AddPackage failed: AddPackage failed with HRESULT 0x80073CF6
2026/06/07 12:02:32.461259 ERROR dialog (opening log): Installation failed: AddPackage failed: AddPackage failed with HRESULT 0x80073CF6
Please share this log with us.
2026/06/07 12:03:43.008302 Elevated process exited with code 1
2026/06/07 12:03:43.008302 Elevation failed: elevated installer exited with code 1
2026/06/07 12:03:43.008302 ERROR dialog (with log path): Administrator access is required to install Claude with full features. You can try again or install without Cowork.
2026/06/07 12:05:16.426138 Log file: C:\Users\DoC\AppData\Local\Temp\ClaudeSetup.log
2026/06/07 12:05:16.426138 === Claude Setup 58400536f3ccde1cff9a129de6c3112dc8cb489a started ===
2026/06/07 12:05:16.426638 AllowAllTrustedApps not found (sideloading assumed enabled): The system cannot find the file specified.
2026/06/07 12:05:16.427138 Windows edition: Professional
2026/06/07 12:05:16.427638 Windows version: 10.0.26200
2026/06/07 12:05:16.427638 Native arch: x64
2026/06/07 12:05:16.427638 Elevation type: Full
2026/06/07 12:05:16.427638 Is elevated: true
2026/06/07 12:05:16.427638 Sideloading enabled: true
2026/06/07 12:05:16.427638 S Mode: false
2026/06/07 12:05:16.427638 Conflicting service: false
2026/06/07 12:05:16.427638 Running in non-elevated context
2026/06/07 12:05:16.427638 User can elevate — installing MSIX directly
2026/06/07 12:05:16.443139 Splash: 400x300, 8 frame(s), animated=true
2026/06/07 12:05:16.443139 System DPI: 96 (scale: 100%)
2026/06/07 12:05:16.470139 MSIX URL: https://api.anthropic.com/api/desktop/win32/x64/msix/latest/redirect
2026/06/07 12:05:16.470700 Downloading MSIX to C:\Users\DoC\AppData\Local\Temp\Claude-3720428082.msix
2026/06/07 12:05:16.477139 proxy: WinHttpGetProxyForUrl("https://api.anthropic.com/api/desktop/win32/x64/msix/latest/redirect"): winapi error #12180
2026/06/07 12:05:16.811885 proxy: WinHttpGetProxyForUrl("https://downloads.claude.ai/releases/win32/x64/1.11187.4/Claude-58400536f3ccde1cff9a129de6c3112dc8cb489a.msix"): winapi error #12180
2026/06/07 12:05:22.303636 Download progress: 10% (22216544 / 222055920 bytes)
2026/06/07 12:05:27.713698 Download progress: 20% (44416688 / 222055920 bytes)
2026/06/07 12:05:32.364487 Download progress: 30% (66616848 / 222055920 bytes)
2026/06/07 12:05:37.215781 Download progress: 40% (88849760 / 222055920 bytes)
2026/06/07 12:05:41.837567 Download progress: 50% (111033536 / 222055920 bytes)
2026/06/07 12:05:46.646608 Download progress: 60% (133233680 / 222055920 bytes)
2026/06/07 12:05:51.618445 Download progress: 70% (155450208 / 222055920 bytes)
2026/06/07 12:05:56.101902 Download progress: 80% (177666752 / 222055920 bytes)
2026/06/07 12:06:00.890300 Download progress: 90% (199850512 / 222055920 bytes)
2026/06/07 12:06:05.980787 Download progress: 100% (222055920 / 222055920 bytes)
2026/06/07 12:06:05.981286 Download complete: 222055920 bytes, SHA256: 8d0d2d8bbbb8373bddf9ac548131bef3facbb70a26df10c69618aeb23c87c73b
2026/06/07 12:06:05.981789 Download complete
2026/06/07 12:06:05.985287 Self-elevating: C:\Users\DoC\Downloads\Claude Setup (2).exe --elevated --msix-path "C:\Users\DoC\AppData\Local\Temp\Claude-3720428082.msix" --log-path "C:\Users\DoC\AppData\Local\Temp\ClaudeSetup.log"
2026/06/07 12:06:06.009296 Waiting for elevated process to complete...
2026/06/07 12:06:06.014294 Log file: C:\Users\DoC\AppData\Local\Temp\ClaudeSetup.log
2026/06/07 12:06:06.014294 === Claude Setup 58400536f3ccde1cff9a129de6c3112dc8cb489a started ===
2026/06/07 12:06:06.015294 AllowAllTrustedApps not found (sideloading assumed enabled): The system cannot find the file specified.
2026/06/07 12:06:06.015294 Windows edition: Professional
2026/06/07 12:06:06.015794 Windows version: 10.0.26200
2026/06/07 12:06:06.015794 Native arch: x64
2026/06/07 12:06:06.015794 Elevation type: Full
2026/06/07 12:06:06.015794 Is elevated: true
2026/06/07 12:06:06.015794 Sideloading enabled: true
2026/06/07 12:06:06.015794 S Mode: false
2026/06/07 12:06:06.015794 Conflicting service: false
2026/06/07 12:06:06.015794 Running in elevated context
2026/06/07 12:06:06.015794 Installing MSIX from C:\Users\DoC\AppData\Local\Temp\Claude-3720428082.msix (all-users: false)
2026/06/07 12:06:06.031794 Splash: 400x300, 8 frame(s), animated=true
2026/06/07 12:06:06.031794 System DPI: 96 (scale: 100%)
2026/06/07 12:06:06.047793 Verifying Authenticode signature on C:\Users\DoC\AppData\Local\Temp\Claude-3720428082.msix
2026/06/07 12:06:06.505793 WinVerifyTrust: MSIX signature is valid
2026/06/07 12:06:06.699717 Signature verified: MSIX signer matches bootstrapper
2026/06/07 12:06:06.700306 Extracted family name from MSIX manifest: Claude_pzs8sxrjxfjjc
2026/06/07 12:06:06.700306 Squirrel process prefix: c:\users\doc\appdata\local\anthropicclaude\
2026/06/07 12:06:06.700306 Checking for running Squirrel Claude processes...
2026/06/07 12:06:06.707806 No Squirrel Claude processes found
2026/06/07 12:06:06.707806 Checking for existing Claude MSIX packages...
2026/06/07 12:06:06.722308 Installing MSIX: C:\Users\DoC\AppData\Local\Temp\Claude-3720428082.msix
2026/06/07 12:06:06.722308 Standard install (not split-account), using AddPackage
2026/06/07 12:06:06.722308 Installing via AddPackage (current-user)...
2026/06/07 12:06:15.725517 MSIX installation failed: AddPackage failed: AddPackage failed with HRESULT 0x80073CF6
2026/06/07 12:06:15.725517 ERROR dialog (opening log): Installation failed: AddPackage failed: AddPackage failed with HRESULT 0x80073CF6
Please share this log with us.
2026/06/07 12:06:28.632008 Elevated process exited with code 1
2026/06/07 12:06:28.632008 Elevation failed: elevated installer exited with code 1
2026/06/07 12:06:28.632008 ERROR dialog (with log path): Administrator access is required to install Claude with full features. You can try again or install without Cowork.
2026/06/07 14:01:29.770172 Log file: C:\Users\DoC\AppData\Local\Temp\ClaudeSetup.log
2026/06/07 14:01:29.770673 === Claude Setup 58400536f3ccde1cff9a129de6c3112dc8cb489a started ===
2026/06/07 14:01:29.771172 AllowAllTrustedApps not found (sideloading assumed enabled): The system cannot find the file specified.
2026/06/07 14:01:29.771172 Windows edition: Professional
2026/06/07 14:01:29.771673 Windows version: 10.0.26200
2026/06/07 14:01:29.771673 Native arch: x64
2026/06/07 14:01:29.771673 Elevation type: Limited
2026/06/07 14:01:29.771673 Is elevated: false
2026/06/07 14:01:29.771673 Sideloading enabled: true
2026/06/07 14:01:29.771673 S Mode: false
2026/06/07 14:01:29.771673 Conflicting service: false
2026/06/07 14:01:29.771673 Running in non-elevated context
2026/06/07 14:01:29.771673 User can elevate — installing MSIX directly
2026/06/07 14:01:29.787172 Splash: 400x300, 8 frame(s), animated=true
2026/06/07 14:01:29.787172 System DPI: 96 (scale: 100%)
2026/06/07 14:01:29.813173 MSIX URL: https://api.anthropic.com/api/desktop/win32/x64/msix/latest/redirect
2026/06/07 14:01:29.813173 Downloading MSIX to C:\Users\DoC\AppData\Local\Temp\Claude-3094841389.msix
2026/06/07 14:01:29.819672 proxy: WinHttpGetProxyForUrl("https://api.anthropic.com/api/desktop/win32/x64/msix/latest/redirect"): winapi error #12180
2026/06/07 14:01:30.156874 proxy: WinHttpGetProxyForUrl("https://downloads.claude.ai/releases/win32/x64/1.11187.4/Claude-58400536f3ccde1cff9a129de6c3112dc8cb489a.msix"): winapi error #12180
2026/06/07 14:01:35.101038 Download progress: 10% (22216544 / 222055920 bytes)
2026/06/07 14:01:39.881818 Download progress: 20% (44416688 / 222055920 bytes)
2026/06/07 14:01:44.591897 Download progress: 30% (66616848 / 222055920 bytes)
2026/06/07 14:01:49.416597 Download progress: 40% (88833376 / 222055920 bytes)
2026/06/07 14:01:54.232166 Download progress: 50% (111033536 / 222055920 bytes)
2026/06/07 14:01:59.101832 Download progress: 60% (133233680 / 222055920 bytes)
2026/06/07 14:02:04.300214 Download progress: 70% (155450208 / 222055920 bytes)
2026/06/07 14:02:08.975802 Download progress: 80% (177650368 / 222055920 bytes)
2026/06/07 14:02:13.753969 Download progress: 90% (199850512 / 222055920 bytes)
2026/06/07 14:02:18.498945 Download progress: 100% (222055920 / 222055920 bytes)
2026/06/07 14:02:18.499469 Download complete: 222055920 bytes, SHA256: 8d0d2d8bbbb8373bddf9ac548131bef3facbb70a26df10c69618aeb23c87c73b
2026/06/07 14:02:18.499967 Download complete
2026/06/07 14:02:18.502468 Self-elevating: C:\Users\DoC\Downloads\Claude Setup (2).exe --elevated --msix-path "C:\Users\DoC\AppData\Local\Temp\Claude-3094841389.msix" --log-path "C:\Users\DoC\AppData\Local\Temp\ClaudeSetup.log"
2026/06/07 14:02:18.595308 Waiting for elevated process to complete...
2026/06/07 14:02:18.600805 Log file: C:\Users\DoC\AppData\Local\Temp\ClaudeSetup.log
2026/06/07 14:02:18.601305 === Claude Setup 58400536f3ccde1cff9a129de6c3112dc8cb489a started ===
2026/06/07 14:02:18.601805 AllowAllTrustedApps not found (sideloading assumed enabled): The system cannot find the file specified.
2026/06/07 14:02:18.601805 Windows edition: Professional
2026/06/07 14:02:18.602305 Windows version: 10.0.26200
2026/06/07 14:02:18.602305 Native arch: x64
2026/06/07 14:02:18.602305 Elevation type: Full
2026/06/07 14:02:18.602305 Is elevated: true
2026/06/07 14:02:18.602305 Sideloading enabled: true
2026/06/07 14:02:18.602305 S Mode: false
2026/06/07 14:02:18.602305 Conflicting service: false
2026/06/07 14:02:18.602305 Running in elevated context
2026/06/07 14:02:18.602305 Installing MSIX from C:\Users\DoC\AppData\Local\Temp\Claude-3094841389.msix (all-users: false)
2026/06/07 14:02:18.617806 Splash: 400x300, 8 frame(s), animated=true
2026/06/07 14:02:18.617806 System DPI: 96 (scale: 100%)
2026/06/07 14:02:18.631696 Verifying Authenticode signature on C:\Users\DoC\AppData\Local\Temp\Claude-3094841389.msix
2026/06/07 14:02:19.080825 WinVerifyTrust: MSIX signature is valid
2026/06/07 14:02:19.276912 Signature verified: MSIX signer matches bootstrapper
2026/06/07 14:02:19.277414 Extracted family name from MSIX manifest: Claude_pzs8sxrjxfjjc
2026/06/07 14:02:19.277911 Squirrel process prefix: c:\users\doc\appdata\local\anthropicclaude\
2026/06/07 14:02:19.277911 Checking for running Squirrel Claude processes...
2026/06/07 14:02:19.286411 No Squirrel Claude processes found
2026/06/07 14:02:19.286913 Checking for existing Claude MSIX packages...
2026/06/07 14:02:19.356107 Installing MSIX: C:\Users\DoC\AppData\Local\Temp\Claude-3094841389.msix
2026/06/07 14:02:19.356107 Standard install (not split-account), using AddPackage
2026/06/07 14:02:19.356107 Installing via AddPackage (current-user)...
2026/06/07 14:02:28.610891 MSIX installation failed: AddPackage failed: AddPackage failed with HRESULT 0x80073CF6
2026/06/07 14:02:28.610891 ERROR dialog (opening log): Installation failed: AddPackage failed: AddPackage failed with HRESULT 0x80073CF6
Please share this log with us.
2026/06/07 14:02:31.740570 Elevated process exited with code 1
2026/06/07 14:02:31.740570 Elevation failed: elevated installer exited with code 1
2026/06/07 14:02:31.740570 ERROR dialog (with log path): Administrator access is required to install Claude with full features. You can try again or install without Cowork.
Get-AppxLog -All | Where-Object { $_.Message -like "*Claude*" } |
>> Select-Object -Last 15 | Format-List Time, Message
Message : error 0x12C: Deleting file \\?\C:\Program Files\WindowsApps\Deleted\Claude_1.8555.2.0_x64__pzs8sxrjxfjjcea77b
e8d-9ef0-4df7-99f1-3329161024b1\app\resources.pak failed.
Message : error 0x12C: Deleting file \\?\C:\Program Files\WindowsApps\Deleted\Claude_1.8555.2.0_x64__pzs8sxrjxfjjcea77b
e8d-9ef0-4df7-99f1-3329161024b1\app\v8_context_snapshot.bin failed.
Message : error 0x12C: Deleting file \\?\C:\Program Files\WindowsApps\Deleted\Claude_1.8555.2.0_x64__pzs8sxrjxfjjcea77b
e8d-9ef0-4df7-99f1-3329161024b1\app\icudtl.dat failed.
Message : error 0x12C: Deleting file \\?\C:\Program Files\WindowsApps\Deleted\Claude_1.8555.2.0_x64__pzs8sxrjxfjjcea77b
e8d-9ef0-4df7-99f1-3329161024b1\app\resources.pak failed.
Message : error 0x12C: Deleting file \\?\C:\Program Files\WindowsApps\Deleted\Claude_1.8555.2.0_x64__pzs8sxrjxfjjcea77b
e8d-9ef0-4df7-99f1-3329161024b1\app\v8_context_snapshot.bin failed.
Message : Deployment Add operation with target volume C: on Package Claude_1.6259.1.0_x64__pzs8sxrjxfjjc from: (Claude
-3913193346.msix) failed with error 0x80073CF6. See http://go.microsoft.com/fwlink/?LinkId=235160 for help d
iagnosing app deployment issues.
Message : Deployment Add operation with target volume C: on Package Claude_1.6259.1.0_x64__pzs8sxrjxfjjc from: (Claude
-2643232896.msix) failed with error 0x80073CF6. See http://go.microsoft.com/fwlink/?LinkId=235160 for help d
iagnosing app deployment issues.
Message : Deployment Add operation with target volume C: on Package Claude_1.6259.1.0_x64__pzs8sxrjxfjjc from: (Claude
-2643232896.msix) failed with error 0x80073CF6. See http://go.microsoft.com/fwlink/?LinkId=235160 for help d
iagnosing app deployment issues.
Message : Deployment Add operation with target volume C: on Package Claude_1.6259.1.0_x64__pzs8sxrjxfjjc from: (Claude
-2643232896.msix) failed with error 0x80073CF6. See http://go.microsoft.com/fwlink/?LinkId=235160 for help d
iagnosing app deployment issues.
Message : Deployment Add operation with target volume C: on Package Claude_1.6259.1.0_x64__pzs8sxrjxfjjc from: (Claude
-1137084348.msix) failed with error 0x80073CF6. See http://go.microsoft.com/fwlink/?LinkId=235160 for help d
iagnosing app deployment issues.
Message : Deployment Add operation with target volume C: on Package Claude_1.4758.0.0_x64__pzs8sxrjxfjjc from: (Claude
-2906325368.msix) failed with error 0x80073CF6. See http://go.microsoft.com/fwlink/?LinkId=235160 for help d
iagnosing app deployment issues.
Message : Deployment Add operation with target volume C: on Package Claude_1.4758.0.0_x64__pzs8sxrjxfjjc from: (Claude
-3152939804.msix) failed with error 0x80073CF6. See http://go.microsoft.com/fwlink/?LinkId=235160 for help d
iagnosing app deployment issues.
Message : Deployment Add operation with target volume C: on Package Claude_1.4758.0.0_x64__pzs8sxrjxfjjc from: (Claude
-1807782210.msix) failed with error 0x80073CF6. See http://go.microsoft.com/fwlink/?LinkId=235160 for help d
iagnosing app deployment issues.
Message : Deployment Add operation with target volume C: on Package Claude_1.3883.0.0_x64__pzs8sxrjxfjjc from: (Claude
-1912065864.msix) failed with error 0x80073CF6. See http://go.microsoft.com/fwlink/?LinkId=235160 for help d
iagnosing app deployment issues.
Message : Deployment Add operation with target volume C: on Package Claude_1.3883.0.0_x64__pzs8sxrjxfjjc from: (Claude
-4261717606.msix) failed with error 0x80073CF6. See http://go.microsoft.com/fwlink/?LinkId=235160 for help d
iagnosing app deployment issues.Steps to Reproduce
- Have Claude Desktop (MSIX) installed on Windows 11
- When an in-app update is available, click "Relaunch"
- Error: "Another program is currently using this file"
- Kill cowork-svc.exe / disable CoworkVMService / use Settings → Terminate / Repair / Reset — error persists
- Uninstall via Remove-AppxPackage, run fresh installer from claude.ai/download
- Installation fails: AddPackage failed with HRESULT 0x80073CF6
- Get-AppxLog shows repeated 0x12C (ERROR_OPLOCK_NOT_GRANTED) failures deleting files in C:\Program Files\WindowsApps\Deleted\Claude_*
Claude Model
None
Is this a regression?
Yes, this worked in a previous version
Last Working Version
Unknown; failures visible in AppX log since ~1.3883.0.0 (April 2026).
Claude Code Version
N/A — Claude Desktop (Windows MSIX) 1.11187.4.0
Platform
Anthropic API
Operating System
Windows
Terminal/Shell
Windows
Additional Information
- Disabling antivirus real-time protection does not help
- Resource Monitor shows no process holding handles on the package path — the oplock is orphaned at the kernel level
- The 0x80073CF6 pattern repeats across versions 1.3883, 1.4758, 1.6259, 1.11187 in the AppX log; each occurrence apparently resolved only by reboot
- 10 orphaned package folders remain in WindowsApps (list attached), so version cleanup has never succeeded on this machine
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