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You may see more then one folder with name starting usbstor.inf_.Find the folder name that starts with usbstor.inf_ Navigate to C:\Windows\System32\DriverStore\FileRepository.If one or more of these files are missing C:\Windows\system32\drivers\usbstor.sys.These 3 files should exist (or the driver is corrupt) > Uncheck "Hide extensions for known file types". > Click Control Panel->Folder Options->View It will be easier to follow instructions if you can easily see Windows file extensions

The following instructions apply to Windows Vista and higher. If error is because no driver could be found, you'll see device status code= 28 Right click the device ->Properties->General tab.

The device may be listed under "Other Devices" or other places in Device Manager. Device Manager will have an entry with a yellow icon - indicating a device error. When driver files are missing, the driver is corrupt and can't be installed. If it's an internal CD/DVD drive Windows only installs the CD/DVD driver for it Only after the Mass Storage driver is installed and working correctly, Windows installs the CD/DVD driver.

If you have a USB CD/DVD note that Windows installs the USB Mass Storage driver first. CD/DVD Driver - used for CD/DVD players.USB Mass Storage Driver - used for external USB storage devices like flash drives, hard disks, and USB CD/DVD drives.How to Repair Corrupt USB Mass Storage or CD/DVD Driversįor some unknown reason, I've been seeing cases where USB Mass Storage or CD/DVD driver files go missing.