LockAppHost.exe High CPU Usage in Windows: 5 Easy Fixes

Solution to LockAppHost.exe's high CPU occupancy problem

LockAppHost.exe is a program released by Microsoft to handle the lock screen of Windows systems. However, sometimes it can take up a lot of CPU resources. This article will provide some solutions to solve the problem of LockAppHost.exe's high CPU occupancy.

What is LockAppHost.exe?

LockAppHost.exe (also known as LockApp.exe) is a service on Windows systems that displays login screen images and other related features, including displaying time, date, and notifications of certain applications. The LockApp.exe file is located in the subfolder of C:\Windows\SystemApps\Microsoft.LockApp_cw5n1h2txyewy .

Normally, LockApp.exe does not perform any tasks, it only displays what needs to be displayed on the lock screen. However, for some reasons, LockAppHost.exe high CPU occupancy issues may occur and need to be fixed.

Five ways to solve the problem of LockAppHost.exe's high CPU occupancy

Before trying the following methods, it is recommended to perform the following simple steps:

• Lock and unlock the computer : When the screen is locked, the process refreshes and stops consuming memory. Just press Win L to lock the computer immediately and unlock it with your password.
• Restart the computer : Restarting the computer can clear some system caches and fix memory problems. Therefore, restarting your computer is a good way to solve the problem of LockAppHost 100% CPU occupancy.

To protect your computer, it is best to back up all important files. Because LockAppHost.exe's high CPU occupancy problem may cause system crashes, resulting in data loss. It is recommended to use MiniTool ShadowMaker and other backup software.

Method 1: Restart the LockAppHost service

The first step to solve the problem of LockAppHost.exe's high CPU occupancy is to restart the LockAppHost service. The steps are as follows:

Step 1: Press Win R key to open the "Run" dialog box.

Step 2: Enter services.msc in the dialog box and click OK to open the Services window.

Step 3: Find LockAppHost , right-click it > select Properties > Stop > Start again.

Step 4: Restart the computer and check whether LockAppHost still occupies too much memory.

Method 2: Disable Windows lock screen

If restarting the LockAppHost service is invalid, you can disable the lock screen in Windows 10/11. The steps are as follows:

Step 1: Press Win R to open the "Run" dialog box, enter regedit and press Enter to start the Registry Editor.

Step 2: Navigate to the following path:

HKEY_LOCAL_MACHINE > SOFTWARE > Policies > Microsoft .

Step 3: Right-click on Windows > Select New > key .

Step 4: Enter Personalization and press Enter .

Step 5: Right-click the newly created key, select New > DWORD (32-bit) Value > and rename it to NoLockScreen .

Step 6: Double-click NoLockScreen , change its value data to 1 , and then click OK .

Then, exit the Registry Editor and restart the computer to check whether the LockAppHost.exe's high CPU occupancy problem has been resolved.

Method 3: End the LockAppHost.exe process

The third method is to end the LockAppHost.exe task from the task manager. This may temporarily solve the problem, as the process will most likely start again after the computer wakes up from sleep.

Step 1: Press Win X > Locate Task Manager > Go to the Details tab.

Step 2: Right-click LockAppHost.exe and select End Task .

If the process starts again after the task is finished, you can also right-click LockAppHost.exe and select End Process Tree .

Method 4: Virus scan

Malware infection is one of the main reasons for the high disk occupancy of LockAppHost.exe. Therefore, you can use Windows Defender or third-party antivirus software to fully scan the system for any suspicious activity. To use Windows Defender for virus scanning, go to Settings > Click Update & Security > Windows Security > Virus and Threat Protection > Scan Options > Select Full Scan > Scan Now .

Method 5: Run SFC Scan

If scanning for malware in your computer doesn't help, you can try using System File Checker (SFC) to fix Windows LockAppHost.exe's high memory footprint. It can scan damaged or lost files in the system and repair them. To run an SFC scan, follow these instructions:

Step 1: Enter cmd in the search box to find the command prompt and select Run as administrator .

Step 2: Type sfc /scannow and press Enter .

Step 3: This takes some time, please wait for the scan to complete and restart the computer.

Summarize

The above is an overview of LockAppHost.exe and a way to solve the problem of LockAppHost.exe's high CPU usage. Hope you can successfully solve this problem.

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