This is the #1 fix for most DLL issues. Download the latest supported Visual C++ Redistributable packages from the Microsoft official site . It is often recommended to install both the x86 and x64 versions.
If SFC fails, use the Deployment Image Servicing and Management tool to repair the system image. ext-ms-win-oobe-query-l1-1-0.dll missing
Since the DLL itself is rarely the problem, you should focus on these steps to resolve the application's failure to launch: This is the #1 fix for most DLL issues
sfc /scannow
This is the most effective solution. It forces Windows to check its own integrity and replace missing or corrupted system files automatically. ext-ms-win-oobe-query-l1-1-0.dll missing
Many "ext-ms" errors are resolved by installing the latest Microsoft Visual C++ Redistributable packages, which provide the necessary libraries for applications to run.