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Fix WUAUSERV (Windows update) High CPU usage in Windows 10 v1803

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Did you notice windows 10 (April 2018 update Version 1803 )PC running slow and became unstable at startup? And while checking on task manager you may found that a svchost.exe process, which is utilized by a service called “wuauserv“, consumes a lot of CPU resources. Let’s understand what is wuauserv process in the Windows operating system? And how to fix wuauserv high CPU usage or 100% disk or  Memory usage problems in Windows 10/8/7.

What is wuauserv and why is it using most of the CPU resource?

Wuauserv is a Windows system service or Windows Update Service enables the detection, download, and installation of updates for Windows and other programs. Means this service is responsible for download, and installation of updates for Windows and other programs. But sometimes due to any reason if this service gets stuck while windows download and install updates you may face high system resource usage such as 100% CPU usage, High Disk usage etc.




Fix wuauserv high CPU usage in Windows 10

There are several reasons can cause this issue such as a virus malware infection, buggy update, system files get corrupted, missing or may the update database get corrupted etc. Whatever the reason behind this here 3 applicable solutions to fix windows update process wuauserv high CPU usage, 100% disk usage in Windows 10.

Start with basic perform a full system scan with a latest updated antivirus application. To make sure any virus/malware infections not causing 100% CPU, Disk usage issue.

Run system file checker utility And DISM command to make sure any corrupted system files, Missing system files not causing the issue. Running SFC utility check for missing system files if found any the utility restore them from a compressed folder located on %WinDir%\System32\dllcache. Again if SFC fails to repair corrupted system files Run DISM command which repair the system image and enable sfc to do its job. After performing this actions Restart your windows and check problem solved.

The wuauserv service has high CPU usage because Windows Update is searching for updates for your computer. It will go down when the process completes. But if Windows Update takes forever to search for updates, you should try the methods below to fix this issue.

Run window update troubleshooter

Windows 10 has a built-in troubleshooter to check and fix issues with windows update related problem. As wuauserv is a windows update related service I would suggest you run this troubleshooter to check it helps to reduce the system resource usage.

To Run the windows update troubleshooter, click start menu search type troubleshoot and hit enter key. Then click on windows update and run the troubleshooter. Follow on-screen instructions and let windows to check and resolve the issue for you. After that restart windows and check CPU usage reduced? If not fallow next solution.

Run Windows update Troubleshooter
Run Windows update Troubleshooter

Reset windows update components

This is another best solution to fix most of the windows update related problems and reactive stuck wuauserv on windows 10. The SoftwareDistribution folder where windows store temporary files required for installing Windows updates on your computer. There may be bug on update files in this folder that make Windows Update get stuck in searching for updates. which cause stuck wuauserv service and cause high CPU usage problem.




Simply open command prompt as administrator then type net stop wuauserv” and press Enter on your keyboard. Then type “net stop bits” and press Enter. To stop windows update and BITs service. Then navigate to C:\Windows\SoftwareDistribution Delete all the files in the SoftwareDistribution folder. (Or you can rename the SoftwareDistribution folder as SoftwareDistribution .old). Again open the command prompt (admin) and perform command “net start wuauserv” and press Enter on your keyboard. Then type “net start bits” and press Enter. To enable windows update and BITS service which you previously disabled. Restart windows and check There is no more high system resource usage.

commands to reset windows update components
commands to reset windows update components

Stop wuauserv

If none of the methods above works for you, you can temporarily stop the wuauserv service. This will free the computer resources it uses for the time being. Then you can install the system updates manually or wait until Microsoft releases next updates. Note: WUAUSERV is only run when Windows Update is running. It’s not an essential service, which you can quickly disable to speed up your Windows computer.

To disable the wuauserv service Press windows + R, type services.msc and click ok to open services window. Here scroll down and double click on windows update. Change startup type Disable and stop the service next to service status. click apply and ok to save changes. That’s all restart windows and check system running smoothly, There is no more High CPU usage or 100% disk usage by wuauserv service.

disable windows update service
disable windows update service

Also Disableing Disable Background Running Apps From Settings click on privacy. Then go to the last option in the left panel Background apps. Here switch off toggles to turn off background apps you don’t need or use.

Again form Start > Settings > System > Notifications & actions and toggle off Get tips, tricks, and suggestions as you use Windows. helpful to fix high System resource usage problem on Windows 10 PC.

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These are some best solutions to fix windows update process (WUAUSERV) High CPU usage in Windows 10. have any query, suggestion about this post feel free to discuss on comments below. Also, read How to Repair/rebuild Master Boot Record (MBR) on windows 10/8.1

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