It is how Microsoft provides native support for USB mass storage devices whose device ID's match either explicit or compatible ID's in 'USBStor.inf', a Windows installation file. 'Usbstor.sys' is a Microsoft signed driver file, the USB Storage Port Driver, located in 'C:\Windows\System32\drivers'. I have tried looking on Microsoft help center and tried Googleing my problem, but found nothing useful. The genuine usbstor.sys file is a software component of Microsoft Windows Operating System by Microsoft Corporation. Here is the start of the log: Startup Repair diagnosis and repair logĪnd whole load of successful tests then the last part Root cause found:ĪCLs on file C:\Windows\system32\drivers\USBSTOR.SYS are not proper. I restarted it a few times and nothing happened, so I ran the Startup Repair tool.
I just restarted my computer and for some reason it gets stuck on the logo screen.
