dir C:\Windows\System32\drivers\usbstor.sys Expected output:

Volume in drive C is Windows Directory of C:\Windows\System32\drivers xx/xx/202x xx:xx AM xx,xxx usbstor.sys To check its digital signature (ensures it's genuine Microsoft):

sfc /scannow This restores the correct version of usbstor.sys from Windows component store. If SFC fails, run: