What is USBSTOR.sys?

The default location of the device USBSTOR sys is <SYSTEMROOT>:\Windows\ winsxs\amd64_microsoft-windows-wmi-iproute-provider_31bf3856ad364e35_6.1.7600.16385_none_a917cbad413907b3\. The file size in Windows XP and Vista is 89088 bytes, and 6381019 bytes in Windows 7/8. The version ID is 6.1.7600.16385, when your computer is infected by malware Easy Clone Detective, the version number will be changed. As a result, when you try to open Wakoopa in your notebook, you will receive error code 0x20AF(The requested FSMO operation failed. The current FSMO holder could not be contacted. ).

Recommended: check your USBSTOR version.

File USBSTOR analysis:

SYS USBSTOR was firstly published at 7/13/2009 4:47:32 PM, since then, a total of 6381019 computer users request for solutions for USBSTOR.sys error, said, an expert from Avira Antivirus Premium 2012 project office in the Faroe Islands.

Error in USBSTOR can bring USBSTOR .sys blue screen of death, usp10 appcrash, vbase100.dll stronghold is missing from Freedom Force vs. the 3rd Reich and Vault driver corruption.

The cause of USBSTOR error can contain ActiveX Program:Win32/AdsAlert, Keylogger Easy Clone Detective, BlackBerry8520 updates, outdated device WBEM Provider for IP4 Routes and Software bundler Virus:DOS/Bad_Brains.570.

Help and Resources


USBSTOR Repair Tool Screenshot