Encountering Windows System Error Code ERROR_390 can be frustrating, especially when it interrupts your workflow or prevents you from running essential applications. Don’t worry! In this detailed, step-by-step guide, we’ll walk you through the troubleshooting process to help you resolve ERROR_390 quickly and effectively.
What is Windows System Error Code ERROR_390?
Before we dive into the solution, it’s helpful to know what ERROR_390 means. Typically, this error relates to issues within system processes or when a particular service or application encounters an unexpected condition. It could be linked to corrupted system files, driver conflicts, or registry problems.
Why Fix ERROR_390?
If left unresolved, ERROR_390 can cause system instability, application crashes, or even data loss. Fixing it promptly ensures your Windows device runs smoothly and minimizes downtime.
How to Fix Windows System Error Code ERROR_390: Step-by-Step Guide
Step 1: Restart Your Computer
Sometimes, a simple reboot can clear temporary glitches causing ERROR_390.
- Click Start > Power > Restart.
- After rebooting, check if the error persists.
Step 2: Run Windows Update
Outdated system files or patches can trigger ERROR_390.
- Press Windows + I to open Settings.
- Go to Update & Security > Windows Update.
- Click Check for updates.
- Install all available updates, then restart your PC.
Step 3: Run the System File Checker (SFC) Tool
Corrupted or missing system files often cause ERROR_390.
- Press Windows + X, select Windows Terminal (Admin) or Command Prompt (Admin).
-
Type the following command and press Enter:
sfc /scannow
- Wait for the scan to complete. This tool will automatically repair corrupted system files.
- Restart your computer.
Step 4: Use the Deployment Image Servicing and Management (DISM) Tool
If SFC didn’t fix the problem, DISM can restore system health.
- Open Command Prompt (Admin) again.
-
Run these commands one by one:
DISM /Online /Cleanup-Image /CheckHealth
DISM /Online /Cleanup-Image /ScanHealth
DISM /Online /Cleanup-Image /RestoreHealth - Once completed, restart your device.
Step 5: Update or Roll Back Drivers
Faulty or outdated drivers might be the culprit.
- Press Windows + X and select Device Manager.
- Identify any devices with a warning icon.
- Right-click on the device and choose Update driver.
- Follow prompts to search automatically for driver updates.
- Alternatively, if the problem started after a recent update, right-click the device, choose Properties > Driver tab > Roll Back Driver.
Step 6: Perform a Clean Boot
This step helps identify if third-party software conflicts with your system.
- Press Windows + R, type
msconfig, and press Enter. - Go to the Services tab.
- Check Hide all Microsoft services.
- Click Disable all.
- Go to Startup tab and click Open Task Manager.
- Disable all startup items.
- Close Task Manager and click OK in System Configuration.
- Restart your computer.
If the ERROR_390 disappears, gradually re-enable services and startup items to identify the conflicting app.
Step 7: Check Your System Registry (Advanced)
Warning: Editing the registry incorrectly can cause serious issues. Proceed only if you are comfortable or seek professional help.
- Press Windows + R, type
regedit, and press Enter. -
Navigate to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\
- Look for any suspicious or missing entries related to ERROR_390 (if you know the specific service or application).
- Backup your registry before making any changes: File > Export > save the backup.
- Delete or fix erroneous keys as needed.
Step 8: Scan for Malware
Malicious software might cause system errors.
- Use Windows Defender or a trusted antivirus program.
- Perform a full system scan.
- Remove any detected threats.
- Restart your computer.
Step 9: Use System Restore
If ERROR_390 started recently, restoring your system might help.
- Press Windows + R, type
rstrui, and press Enter. - Follow the prompts to restore your system to an earlier date when your computer worked fine.
- Restart your PC and check.
Step 10: Reset or Reinstall Windows (Last Resort)
If all else fails:
- Backup your important data.
- Go to Settings > Update & Security > Recovery.
- Choose Reset this PC, then select to keep or remove your files.
- Follow the instructions to reset your system.
Tips to Prevent System Errors Like ERROR_390
- Keep your Windows OS and drivers updated.
- Regularly scan your PC for malware.
- Avoid installing untrusted software.
- Maintain backups of your important files.
- Use system maintenance tools like disk cleanup and defragmentation.
Final Thoughts
Facing Windows System Error Code ERROR_390 can feel overwhelming, but with patience and the right steps, you can fix it yourself. This comprehensive guide covers the most common and effective fixes — remember to proceed one step at a time and always back up your system when performing major changes.
If you’re still stuck after trying everything, don’t hesitate to reach out to a professional technician for help.
Did this guide help you fix ERROR_390? Share your experience or ask questions in the comments below!
Meta Description:
Struggling with Windows System Error Code ERROR_390? Follow our detailed step-by-step troubleshooting guide to fix the error and restore your PC’s performance quickly and easily.
