Since the ext-ms-win-oobe-query-l1-1-0.dll is an API set that modern programs depend on, making sure all the latest Visual C++ runtimes are installed is a key fix.

Do you know was open when this error first appeared?

The extmswinoobequeryl110.dll error indicates a corruption in Windows system files. The best path to a solution is running sfc /scannow followed by a Windows Update. If that fails, a Repair Install via the Media Creation Tool is the definitive fix.

If the error only occurs when launching a specific third-party program or game, the application’s installer may have failed to register its dependent libraries correctly. Open > Apps > Installed apps .