Crash - Why Does Wuauclt.exe

Key Windows DLLs that wuauclt.exe depends on may be missing or altered.

The this pointer ( ecx ) is null. The CUpdate object was never instantiated because a previous function failed to parse an update XML node. Why Does Wuauclt.exe Crash

wuauclt.exe expects a manifest for Update ID 1234-5678 . When the server responds with "404 Not Found" for that manifest, the deserialization routine in wuaueng.dll fails to allocate an error object and returns NULL . The subsequent line of code attempts to log the error by calling strlen(NULL) . This is an instant , crashing the process without ever logging a meaningful error to the WindowsUpdate.log file. Key Windows DLLs that wuauclt