About this tag
The usbstor tag on WindowsForum.com covers issues related to the USBSTOR.SYS driver, a core Windows driver for USB mass storage devices. Common problems include Code 38 errors where Windows cannot load the driver because a previous instance is still in memory, system crashes with DRIVER_VERIFIER_IOMANAGER_VIOLATION when driver verifier is enabled on usbstor.sys, and startup failures due to improper ACLs on the USBSTOR.SYS file. Additionally, incorrect permissions on usbstor.inf and usbstor.pnf can cause Windows 7 and Server 2008 R2 Service Pack 1 installation to fail with error 0x800f0826. Discussions focus on troubleshooting these driver-related errors through permission fixes, driver updates, and system repairs.
  1. E

    Windows 8 Code 38 Error. Window Driver USBSTOR.sys

    My Win 8 x64 desktop suddenly stopped recognizing USB storage devices (Thumb Drives & 2 External HDD). When working through Device manager, all show yellow exclamation marks and working through properties, all say "Windows cannot load the device driver for this hardware because a previous...
    • edknight
    • Thread
    • asrock code 38 control panel desktop support device driver device manager driver issues driver update error message external drive general fixes hardware detection memory issues reboot system restore thumb drive troubleshooting usbstor windows 8
    • Replies: 4
    • Forum: Windows Hardware
  2. W

    Windows 7 ACLs on file C:\Windows\system32\drivers\USBSTOR.SYS are not proper.

    Hi all I just restarted my computer and for some reason it gets stuck on the logo screen. I restarted it a few times and nothing happened, so I ran the Startup Repair tool. Here is the start of the log: Startup Repair diagnosis and repair log --------------------------- Number or repair...
    • Will Bennion
    • Thread
    • access control acl computer issues error codes log screen startup repair system restore troubleshooting usbstor windows
    • Replies: 1
    • Forum: Windows Help and Support