Storage QoS Filter Driver (storqosflt) Service Defaults in Windows 10

Provides Quality of Service for storage I/O traffic.

Default Settings

Startup type:Automatic
Display name:Storage QoS Filter Driver
Service name:storqosflt
Service type:filesys
Error control:normal
Group:FSFilter Quota Management
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\storqosflt

Default Behavior

Storage QoS Filter Driver is a file system driver. In Windows 10 it is starting automatically when the operating system starts. If Storage QoS Filter Driver fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the storqosflt service has failed to start due to the error.


Storage QoS Filter Driver cannot be started under any conditions, if the FltMgr service is disabled.

Restore Default Startup Configuration for Storage QoS Filter Driver

1. Select your Windows 10 edition and release, and then click Download.

2. Save the Win10_storqosflt_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The storqosflt service is using the storqosflt.sys file that is located in the %WinDir%\system32\drivers folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 10 installation media.