Encountering Windows System Error Code ERROR_20 can be frustrating, especially when you’re in the middle of important tasks. This error commonly appears with a message indicating, “The system cannot find the device specified.” Don’t worry! In this comprehensive guide, I’ll walk you through what ERROR_20 means, why it happens, and—most importantly—how to fix it step-by-step.
What is Windows System Error Code ERROR_20?
ERROR_20 is an error code in Microsoft Windows which generally translates to “The system cannot find the device specified.” It typically occurs when the operating system attempts to access a hardware device or a resource that is missing or incorrectly configured.
This error can surface in various scenarios, such as:
- Trying to access USB drives or external storage.
- Running software that depends on specific hardware.
- During startup or while performing updates.
Understanding the root cause of ERROR_20 helps us troubleshoot effectively.
Common Causes of Error Code ERROR_20
Before jumping into fixes, let’s briefly look at what might cause this error:
- Disconnected or faulty hardware device: The device is unplugged or malfunctioning.
- Incorrect or outdated device drivers: Drivers controlling the hardware are corrupted or incompatible.
- Missing or corrupted system files: Essential Windows files related to device handling are missing or damaged.
- Improper system configuration: Registry entries or system settings point to nonexistent devices.
- Issues with external peripherals or USB devices: The system can’t properly detect the attached device.
Step-by-Step Guide to Fix Windows System Error Code ERROR_20
Let’s deep dive into actionable solutions to resolve this issue.
Step 1: Restart Your Computer
Sometimes, a simple reboot can resolve temporary glitches that cause ERROR_20.
- Click Start > Power > Restart.
- After reboot, check if the error persists.
If the issue continues, move to the next step.
Step 2: Check Physical Connections and Hardware Devices
Since ERROR_20 relates to device detection, it’s essential to verify your hardware:
- Disconnect all external devices like USB drives, printers, external hard drives.
- Reconnect them securely one by one.
- Make sure cables are not damaged.
- If you can, try connecting devices to another computer to rule out hardware failure.
If a device is failing, replacing it may fix the error.
Step 3: Run the Hardware and Devices Troubleshooter
Windows includes built-in troubleshooters that automatically detect and fix hardware issues:
- Press Windows + I to open Settings.
- Navigate to Update & Security > Troubleshoot.
- Click Additional troubleshooters.
- Select Hardware and Devices and click Run the troubleshooter.
- Follow on-screen instructions and apply recommended fixes.
Restart your system and check for ERROR_20.
Step 4: Update or Reinstall Device Drivers
Outdated or corrupt drivers often trigger ERROR_20.
- Press Windows + X and select Device Manager.
- Look for any device marked with a yellow triangle — this indicates issues.
- Right-click the problematic device and select Update driver.
- Choose Search automatically for updated driver software.
- If no updates are found, try uninstalling and then reinstalling drivers:
- Right-click the device > Uninstall device.
- Restart your computer and Windows will attempt to reinstall the correct drivers.
You can also visit the manufacturer’s website for the latest version of drivers.
Step 5: Check System File Integrity Using SFC and DISM
Corrupted system files can lead to ERROR_20. Running System File Checker (SFC) and Deployment Image Servicing and Management (DISM) tools often repairs these files:
- Open Command Prompt as Administrator:
- Press Windows + S, type
cmd, right-click Command Prompt, and select Run as administrator.
- Press Windows + S, type
-
Run the SFC scan:
sfc /scannow
- Wait for the scan to complete. It will repair corrupted files automatically.
-
If the issue persists, run DISM commands:
DISM /Online /Cleanup-Image /RestoreHealth
- This process checks Windows Image for corruption and repairs it.
Reboot the system after both scans finish and see if ERROR_20 disappears.
Step 6: Check Registry Entries (Advanced)
Note: Editing the registry incorrectly can cause system instability. Always back it up before making changes.
If ERROR_20 is due to incorrect registry references to devices, fixing it might help:
- Press Windows + R, type
regedit, and press Enter. -
Navigate to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\
- Carefully check for references to devices that no longer exist.
- Remove entries related to devices you have safely uninstalled or removed.
If you’re unsure, consider seeking assistance from a trusted technician or using a reputable registry cleaner.
Step 7: Perform a System Restore
If the error started recently, restoring your PC to a previous point can undo problematic changes.
- Search for Create a restore point in Windows Start.
- In System Properties > System Protection tab, click System Restore.
- Choose a restore point before ERROR_20 began.
- Follow the prompts to restore system settings.
Make sure to back up important files, as changes will be reversed.
Step 8: Update Windows
Microsoft frequently releases updates to fix bugs and improve system stability:
- Go to Settings > Update & Security > Windows Update.
- Click Check for updates.
- Install any available updates and restart your PC.
Sometimes, an update resolves underlying issues causing ERROR_20.
Step 9: Seek Professional Help if Needed
If none of the above solutions work, it might indicate deeper hardware faults or complex system corruption.
- Contact Microsoft Support.
- Visit a local, trusted computer repair professional.
- Backup all important data before further troubleshooting.
Preventive Tips to Avoid ERROR_20 in Future
- Always eject external devices safely.
- Keep device drivers and Windows OS up to date.
- Use reliable antivirus software to avoid malware affecting system files.
- Periodically check hardware health and replace aging components.
Conclusion
ERROR_20 can seem daunting, but with this step-by-step guide, you’ve got the tools to fix it efficiently. Whether it’s a hardware connection issue, driver conflict, or system file corruption, carefully following these instructions can restore your Windows system to smooth functioning.
Remember, technology glitches are part of the journey—each fix is a learning experience. Take your time, and if you feel stuck, don’t hesitate to reach out to professionals.
If this guide helped you, please share it with others who might need it. Stay tech-savvy and productive!
Keywords: Windows System Error Code ERROR_20, how to fix ERROR_20, system cannot find device specified, Windows error fix, device driver update, hardware troubleshooting Windows
If you have any questions or want to share your own tips for fixing ERROR_20, feel free to comment below!
