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How to Fix Windows Error Code ERROR_108: A Step-by-Step Guide


Encountering errors on your Windows computer can be frustrating—especially when they disrupt your workflow or slow down your system. One such error is Windows Error Code ERROR_108, a message that often appears during system operations or while running specific applications. But don’t worry! In this detailed, easy-to-follow guide, I’ll walk you through how to fix Windows Error Code ERROR_108, step-by-step, so you can get back to using your computer smoothly and confidently.


What Is Windows Error Code ERROR_108?

Before diving into the fix, it’s helpful to understand what this error means. ERROR_108 (The semaphore is set.) usually indicates a problem related to synchronization objects within the Windows operating system—like semaphores or mutexes—which help different processes communicate and coordinate. This can lead to conflicts or failures when multiple programs are trying to access shared resources simultaneously.

Common causes include:

  • Corrupted system files
  • Conflicting software or drivers
  • Faulty hardware or peripheral connections
  • Issues with system updates or installations


Step 1: Restart Your Computer

It sounds simple, but a restart often clears temporary glitches causing the error.

  • Save your work.
  • Click on Start > Power > Restart.
  • After rebooting, check if the error persists.


Step 2: Run the System File Checker (SFC) Tool

Windows has a built-in utility to detect and repair corrupted system files.

  1. Press Windows Key + S, type cmd.
  2. Right-click Command Prompt and select Run as administrator.
  3. In the black command window, type:

    sfc /scannow

  4. Press Enter. Let the scan complete—it typically takes 10-15 minutes.
  5. If any corrupt files are found, Windows will attempt to repair them automatically.
  6. Restart your PC and see if ERROR_108 is resolved.


Step 3: Use DISM to Repair Windows Image

If SFC doesn’t fix the issue, use DISM (Deployment Image Servicing and Management) to repair system files.

  1. Open Command Prompt as administrator (see Step 2).
  2. Type the following command and press Enter:

    DISM /Online /Cleanup-Image /RestoreHealth

  3. Wait patiently; this process can take 15-30 minutes.
  4. After completion, restart your computer and check for the error.


Step 4: Check for Windows Updates

Microsoft regularly releases patches that fix bugs and improve system stability.

  1. Press Windows Key + I to open Settings.
  2. Select Update & Security > Windows Update.
  3. Click Check for updates.
  4. Install any available updates.
  5. Restart your PC once updated.


Step 5: Update or Roll Back Drivers

Faulty or incompatible drivers are common culprits behind ERROR_108.

To Update Drivers:

  1. Right-click Start and select Device Manager.
  2. Expand categories such as Display adapters, Network adapters, or others relevant to your issue.
  3. Right-click the device and select Update driver.
  4. Choose Search automatically for updated driver software.
  5. Follow on-screen instructions.

To Roll Back Drivers (if error started after a driver update):

  1. In Device Manager, right-click the device and select Properties.
  2. Go to the Driver tab.
  3. Click Roll Back Driver (if available).
  4. Restart your system and check if the error is resolved.


Step 6: Scan for Malware

Malicious programs can cause unpredictable system errors.

  1. Open Windows Security by typing it into the Start Menu.
  2. Click Virus & threat protection.
  3. Select Quick scan or Full scan for a deeper check.
  4. Follow any recommendations, including removing or quarantining threats.


Step 7: Perform a Clean Boot

A clean boot starts Windows with the minimum set of drivers and startup programs. This can help identify if third-party software is causing the problem.

  1. Press Windows Key + R, type msconfig, and press Enter.
  2. In the System Configuration window, go to the Services tab.
  3. Check Hide all Microsoft services.
  4. Click Disable all.
  5. Go to the Startup tab and click Open Task Manager.
  6. Disable all startup items.
  7. Close Task Manager, then click OK in System Configuration.
  8. Restart your PC and check if ERROR_108 still appears.

If the error is gone, gradually re-enable services/startup items to identify the culprit.


Step 8: Check Hardware Connections and Perform Diagnostics

If none of the software fixes work, the issue might be hardware-related.

  • Inspect RAM sticks, internal cables, and peripherals to ensure they’re securely connected.
  • Use built-in diagnostics or third-party tools to test your hard drive, RAM, and other components.
  • Consult your PC or device manufacturer’s website for specific hardware diagnostic tools.


Step 9: Restore or Reset Windows (Last Resort)

If all else fails, restoring your system to an earlier state or performing a fresh Windows install may be necessary.

To Restore:

  1. Press Windows Key + S, type restore, and select Create a restore point.
  2. Click System Restore and follow prompts to select a restore point prior to the error’s occurrence.

To Reset:

  1. Go to Settings > Update & Security > Recovery.
  2. Under Reset this PC, click Get started.
  3. Choose to Keep my files or Remove everything.
  4. Follow instructions to complete the reset.

Note: Resetting will remove installed applications and possibly files, so back up important data.


Final Thoughts

Windows Error Code ERROR_108 can be a pesky roadblock, but with patience and these detailed steps, you can tackle it like a pro. Remember, many errors stem from software conflicts or minor corruptions—often easily solvable without needing a tech expert. However, if you’re unsure or uncomfortable performing these steps, don’t hesitate to reach out to professional support.

If this guide helped you, share it with others who might be facing the same issue! And as always, keep your system updated and back up your data regularly.


Did you find this guide helpful? Feel free to leave a comment or ask any questions below!


Keywords: Fix Windows Error Code ERROR_108, ERROR_108 Windows fix, how to resolve ERROR_108, Windows semaphore error, Windows error troubleshooting, Windows system repair steps

Updated on June 17, 2025
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