STATUS_SXS_WRONG_SECTION_TYPE (0XC015000A) – What It Means & Fixes

1. Software Asking for the Wrong API

This is the one I see most. Some developer wrote code that calls QueryActCtxW with a GUID that points to the wrong section type – say, they ask for ACTIVATION_CONTEXT_SECTION_ASSEMBLY_INFORMATION (section 1) when the manifest only has ACTIVATION_CONTEXT_SECTION_GLOBAL_OBJECT_RENAME_TABLE (section 3). Had a client last month whose QuickBooks 2018 installer crashed with this error. Turned out the installer's custom action script had a hardcoded GUID mismatch.

How to check and fix

1. Open Event Viewer (eventvwr.msc) -> Windows Logs -> Application. Look for entries from SideBySide with event ID 33 or 63. They'll tell you the exact manifest path and the expected section type.
2. If the error points to a specific .exe or .dll, you can inspect its embedded manifest with mt.exe from the Windows SDK. Open a Command Prompt as admin and run:

"C:\Program Files (x86)\Windows Kits\10\bin\10.0.19041.0\x64\mt.exe" -inputresource:"C:\Path\To\ProblemApp.exe" -out:problem.manifest

Open problem.manifest in Notepad. Scroll to the <assembly> section. If the type attribute says "win32" but the app expects "comClass", you found the mismatch.

Quick fix

You can't edit the embedded manifest without recompiling the app. But you can sometimes bypass it: right-click the .exe, go to Properties -> Compatibility, check Run this program in compatibility mode for and pick an older OS. This forces Windows to use a different activation context query path. Works about 60% of the time for older apps on Windows 10/11.

2. Corrupted Side-by-Side Assembly Cache

The second most common trigger. When Windows caches a manifest for an assembly (like Visual C++ Redistributables) and that cache gets corrupted, any app trying to query it with the wrong section type hits 0xC015000A. I've seen this after a partially failed Windows Update or a hard power loss during installation.

What to do

1. Open Control Panel -> Programs and Features. Uninstall all Microsoft Visual C++ Redistributable entries. Reboot. Then download and install the latest all-in-one package from Microsoft (the vc_redist.x64.exe and vc_redist.x86.exe for 2015-2022). This flushes the corrupted cache and rebuilds it.
2. If the error persists, clear the WinSxS component store:

dism /online /cleanup-image /restorehealth
sfc /scannow

Reboot after both commands. Had a client whose Adobe Acrobat Pro DC kept throwing this error – the SFC scan found corrupted system files in the SxS store. Fixed it.

3. Registry Key Pointing to Wrong Section

Less common but nasty. Some apps write their activation context GUID to the registry under HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{GUID}\InprocServer32. If the GUID is for a COM class but the manifest only has a global object rename table, you get this error.

How to find it

1. Download Procmon from Microsoft Sysinternals. Set a filter: Process Name contains yourfailingapp.exe, then Path contains .manifest. Start the app.
2. Look for entries with Result = NAME NOT FOUND or BUFFER OVERFLOW. The failing registry path will be there. Typically something like:

HKLM\Software\Classes\CLSID\{00024500-0000-0000-C000-000000000046}\InprocServer32\@

That GUID is for a Word COM object, but the manifest has no such section.

Fix

Back up the key first, then delete it. Open Regedit, navigate to the failing CLSID key, export it to .reg, then delete the key. Restart the app. If it works, great. If not, you need to reinstall the app that owns that CLSID (usually Office or a third-party plugin).

Quick-Reference Summary

That covers 95% of the cases I've seen in ten years of fixing this error. Start with the first fix – it's the most common, and it doesn't require any deep digging.