How to fix Error 1111 on Windows 11

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Windows Error 1111: “The I/O Bus Was Reset” Troubleshooting Guide

Why This Error Happens

Error 1111 occurs when the storage or peripheral controller detects a hardware-level fault—such as a failing drive, loose SATA/NVMe connection, or unstable driver—and forces a bus reset to prevent data corruption. This is commonly logged in the System event log under Event ID 11 or 1111, tied to the disk or storage controller driver source. Outdated firmware, faulty cabling, or a degrading physical disk are the most frequent underlying causes.

Step-by-Step Resolution Guide

  1. Check Physical Connections (for desktops/removable drives)
    Power down the machine, open the case, and reseat the SATA and power cables on the affected drive. For NVMe drives, ensure the M.2 stick is fully seated in its slot.

  2. Update Storage Controller Drivers

  • Press Win + X → select Device Manager.
  • Expand IDE ATA/ATAPI controllers or Storage controllers.
  • Right-click your controller (e.g., Intel RST, AMD chipset SATA) → Update driver → Search automatically for drivers.
  • If an update is found, install it and restart.
  1. Run CHKDSK to Scan for Disk Errors
  • Open Command Prompt as Administrator.
  • Run:

    chkdsk C: /f /r /x
  • Confirm the scan on next restart if prompted, since the drive is in use.
  1. Check SMART Status and Firmware
  • Open Command Prompt and run:

    wmic diskdrive get status
  • If it returns anything other than “OK,” the drive may be failing.
  • Visit the drive manufacturer’s website (Samsung Magician, Crucial Storage Executive, WD Dashboard, etc.) to check for firmware updates.
  1. Disable Link Power Management (for USB/External Drives)
  • Go to Control Panel → Power Options → Change plan settings → Change advanced power settings.
  • Expand USB settings → USB selective suspend setting and set to Disabled.
  • This prevents the bus from powering down and triggering a reset on external enclosures.

Alternative or Verification Steps

  • Verify the fix: Open Event Viewer (eventvwr.msc) → Windows Logs → System, and filter for Event ID 11/1111. If no new instances appear after 24–48 hours of normal use, the issue is resolved.
  • Alternative: If errors persist, test the drive in another SATA port/USB port or on a different PC. If the error follows the drive, it likely needs to be replaced; if it stays with the port, the motherboard/controller or cable is at fault.