How to fix
Windows Event Log high CPU usage
on Windows

Hi. I have been having issues with the performance of my PC. Checking the Task Manager, I noticed that Windows Audio Endpoint Builder CPU usage is very high, sometimes going up to 50-60%. I am pretty sure it shouldn't be behaving this way and slowing my PC down.

In computing, especially within the Windows operating system, resource management is a critical component that ensures smooth and efficient performance. Resources such as the CPU (Central Processing Unit) are allocated dynamically to various tasks as needed. It's common for certain processes to momentarily increase CPU usage during intensive operations. However, consistently high CPU usage is indicative of a problem and can severely impact system performance.

One issue that some users may encounter is the Windows Event Log service consuming high CPU resources, as observed in the Task Manager. This is an unusual occurrence, as the Windows Event Log is a service designed to log system, application, and security-related events. These logs are vital for system diagnostics and monitoring, providing detailed records of what the system is doing.

When the Windows Event Log service shows high CPU usage, it is often a symptom of deeper system issues. This could be due to an extensive number of events being processed or logged, possibly due to system or application errors. In some cases, a flood of event log entries can be triggered by security breaches or malfunctions in system components. Moreover, a corrupt event log file could also cause this service to consume more CPU resources as it attempts to process or rectify the corrupted data.

If you are experiencing high CPU usage due to the Windows Event Log service, it indicates that the service is overtaxed. The next steps might involve examining the event logs for numerous or repetitive entries and considering the health of the system files involved.

Although the Windows Event Log is a background service that usually operates with minimal resource consumption, high CPU usage by this service is a clear signal that there is an issue within the system. For those seeking an uncomplicated resolution, a PC repair tool [d1] may be beneficial in automatically diagnosing and fixing underlying issues with the Windows operating system.

Fix 1. Clear Event Viewer log

The Event Viewer in Windows retains a log of system and application messages, including errors and warnings. Over time, these logs can accumulate and may cause the Windows Event Log service to consume more resources, including CPU. Clearing the log can sometimes resolve issues of high CPU usage.

• Press the Windows key, type Event Viewer, and press Enter.
• In the Event Viewer, expand the Windows Logs section on the left side.
• Right-click on the specific log (e.g., Application, Security, System) that you want to clear and select Clear Log.
• You will be given an option to save the log before clearing it. You can choose to Save and Clear or Clear without saving.

Fix 2. Run SFC and DISM

Corruption of system files can be the reason for many issues on Windows. To repair them, follow these steps:

• Type in cmd in Windows search.
• Right-click on Command Prompt and select Run as administrator.
• When User Account Control shows up, click Yes.
• In the Command Prompt window, paste the following command and hit Enter:
  sfc /scannow
• Next, use the following commands, pressing Enter each time:
  Dism /Online /Cleanup-Image /CheckHealth
  Dism /Online /Cleanup-Image /ScanHealth
  Dism /Online /Cleanup-Image /RestoreHealth
  (Note: if you get an error executing this last command, add /Source:C:\RepairSource\Windows /LimitAccess to it and try again).
• Reboot your PC.

Fix 3. Disable certain antivirus features

Some third-party antivirus features can cause high CPU usage due to real-time scanning or other active processes. Temporarily disabling these features can help determine if they are the cause.

• Open your antivirus application.
• Look for a settings or configuration option within the application.
• Find the real-time scanning or automatic scanning feature and disable it.
• Monitor your CPU usage to see if it decreases.
• If it does, make sure you update your antivirus with the latest version or contact the provider for support.
• Alternatively, consider switching to another AV or simply relying on Windows Defender.

Fix 4. Run Clean Boot

A Clean Boot starts Windows with a minimal set of drivers and startup programs. This can help identify if third-party software is causing high CPU usage.

• Type msconfig in Windows search and press Enter.
• Pick the Services tab.
• Mark Hide all Microsoft services and select Disable all.
• Select the Startup tab and click Open Task Manager.
• In the Task Manager, right-click on each of the items and select Disable, then close the Task Manager.
• Go to the Boot tab, tick Safe Boot, then click Apply and OK.
• Restart your computer and observe if the CPU usage is still high. If it is not, enable services and startup items one by one to identify the culprit.

Fix 5. Create a new user account

Corruption within a user profile can lead to excessive CPU usage. Creating a new user account can resolve these issues.

• Right-click on Start and pick Settings.
• Go to the Accounts section.
• Select Family & other users on the left.
• Under Other users, click Add someone else to this PC.
• Select I don't have this person's sign-in information > Add a user without a Microsoft account.
• Enter the required information and click Next.
• Restart your device once done.
• Log out from the current account and log into the new account to see if the situation has improved.

Fix 6. Update Windows

Outdated Windows can cause compatibility issues leading to high CPU usage. Ensuring you have the latest updates can resolve these issues.

• Type Updates and press Enter.
• In the new window, click Check for updates.
• Wait till all the files are downloaded and installed.
• If optional updates are available, install them as well.
• Restart your device when done.

Fix 7. Reset Windows

If all else fails, resetting Windows to its default state can resolve persistent issues with high CPU usage.

• Right-click on Start and then select Settings.
• Go to Update & Security and pick Recovery on the left side of the window.
• Find Reset this PC section and click Get Started.
• Select Keep my files and Cloud download.
• Next, pick whether you want to reinstall the apps.
• Click Reset.
• Your system will restart, and the process of Windows reset will begin.