USB Mass Storage Driver - Windows 7 Service
USB Mass Storage Class Driver by Microsoft Corporation.
This service also exists in Windows 10, 11, 8 and Vista.
Startup Type
| Windows 7 edition | without SP | SP1 |
|---|---|---|
| Starter | Manual | Manual |
| Home Basic | Manual | Manual |
| Home Premium | Manual | Manual |
| Professional | Manual | Manual |
| Ultimate | Manual | Manual |
| Enterprise | Manual | Manual |
Default Properties
| Display name: | USB Mass Storage Driver |
| Service name: | USBSTOR |
| Type: | kernel |
| Path: | %WinDir%\system32\DRIVERS\USBSTOR.SYS |
| Error control: | normal |
Default Behavior
The USB Mass Storage Driver service is a kernel driver. If the USB Mass Storage Driver fails to load or initialize, the error is recorded into the Event Log. Windows 7 startup should proceed, but a message box is displayed informing you that the USBSTOR service has failed to start.
Restore Default Startup Type of USB Mass Storage Driver
Automated Restore
1. Select your Windows 7 edition and Service Pack, and then click on the Download button below.
2. Save the RestoreUSBMassStorageDriverWindows7.bat file to any folder on your hard drive.
3. Right-click the downloaded batch file and select Run as administrator.
4. Restart the computer to save changes.
Note. Make sure that the USBSTOR.SYS file exists in the %WinDir%\system32\DRIVERS folder. If this file is missing you can try to restore it from your Windows 7 installation media.