How to fix Error 620 on Windows 11

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Why This Error Happens

Error 620 (ERROR_PNP_INVALID_ID) occurs when the Windows Plug and Play (PnP) Manager tries to read or write a device instance path in the registry that is malformed, truncated, or points to a non-existent enumeration branch. This is typically caused by corrupted entries under HKLM\SYSTEM\CurrentControlSet\Enum, leftover “ghost” device entries from improperly uninstalled hardware, or a third-party driver installer/setup script passing a badly formatted device ID string to the PnP subsystem. It can also surface if the Windows driver store or PnP database itself has become corrupted after a failed update or driver installation.

Step-by-Step Resolution Guide

  1. Create a System Restore Point before making changes:
  • Open Control Panel > System > System Protection > Create, and name it “Pre-PnP-Fix”.
  1. Remove Ghost/Orphaned Devices in Device Manager:
  • Open Device Manager (devmgmt.msc).
  • Click View > Show hidden devices.
  • Expand each category and look for grayed-out (ghosted) devices.
  • Right-click each ghost device and select Uninstall device, checking “Delete the driver software for this device” if available.
  1. Inspect and Clean the PnP Registry Branch:
  • Open regedit and navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum.
  • Look for keys with unusually short, blank, or corrupted subkey names (e.g., missing DeviceDesc or Driver values) under USB, PCI, or SW branches.
  • Export the key first (right-click > Export) as a backup, then delete only the clearly corrupted/empty entries. Do not delete active hardware keys.
  1. Repair System Files with SFC and DISM:
  • Open Command Prompt (Admin) and run:

    sfc /scannow
  • Follow with:

    DISM /Online /Cleanup-Image /RestoreHealth
  • Restart the PC after both complete successfully.
  1. Re-scan and Rebuild PnP Device Tree:
  • In an elevated Command Prompt, run:

    pnputil /scan-devices
  • This forces Windows to re-enumerate all Plug and Play devices and rebuild valid registry paths.

Alternative or Verification Steps

  • After rebooting, open Event Viewer (eventvwr.msc) under Windows Logs > System and confirm Error 620 no longer appears when the triggering application or device action runs.
  • Run pnputil /enum-devices /problem in Command Prompt — if no devices show a PnP error status, the fix was successful. If the error persists, consider a Windows Update repair install (in-place upgrade) to fully rebuild the PnP database without affecting personal files.