Ext-ms-win-oobe-query-l1-1-0.dll Missing Jun 2026

: Ensure you are running the release build with all necessary bundled DLLs.

If your application is actually failing to launch with an error code like 0xc000007b , try these verified solutions: ext-ms-win-oobe-query-l1-1-0.dll missing

missing file (like a compiler runtime or a specific library), but the debugger stops and reports this extension file instead. Microsoft Learn : Ensure you are running the release build

Visit the official Microsoft support page to download the latest redistributables. Install both the x86 and x64 versions. ⚠️ Important Warning ext-ms-win-oobe-query-l1-1-0.dll missing

The error usually presents itself in one of three ways: