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wuauclt.exe process taking high CPU error

May 19, 2014

DLL ToolDLL TOOL free downloads wuauclt.exe and repairs wuauclt.exe process keeps taking high CPU usage problems for Microsoft Windows 8.1/8/7/XP/Vista OS, both 32 and 64 bits.

About wuauclt.exe

WUAUCLT stands for Windows Update AutoUpdate Client for WindowsMe. The wuauclt.exe file is a background process which checks with the Microsoft website for updates to the operating system. It shows up on the Task Manager's processes list when it is waiting for a response, such as to confirm permission to download an update.

The wuauclt.exe file is located in the folder C:\Windows\System32. In other cases, wuauclt.exe is a virus, spyware, Trojan or worm! Check this with Security Task Manager. This is a file required by Windows Security Control Center. You can disable the Windows Update feature through the Control Panel.

There are two in the XP SP1 system32 folder, both for automatically updating windows. You will get this file if you allow any of the new v5.windowsupdate.microsoft.com ... digital certificates to install on your PC. Don't use autoupdate, manually update. If you have the misfortune of installing this, delete it and rename the old (wuauclt) file again.

The Windows Update service (wuauserv) enables the download and installation of security updates for Windows and Office. It automatically provides Windows computers with the latest updates, drivers, and enhancements. When an Internet connection is available, the operating system searches for applicable updates. Depending on the configuration settings, the service may notify the user before download, notify the user before installation, or automatically install the updates.

You can also use the Local Group Policy Editor to configure an intranet server that is configured with Windows Server Update Services to host updates from the Microsoft Update sites. This setting lets you specify a server on your network to function as an internal update service. The Windows Updates client searches this service for updates that apply to the computers on your network.

The Windows Update service is installed by default and configured for an automatic start. It logs on using the Local System account. If the Windows Update service stops or if you disable it, updates are not downloaded to the computer automatically. You must search for, download, and install applicable fixes manually.

Typical wuauclt.exe errors

Wuauclt.exe memory and CPU usage

  1. SVCHOST.EXE and WUAUCLT.EXE causing low virtual memory!
  2. Wuauclt.exe hogs all processor time making computer unusable.

Wuauclt.exe virus infection

  1. C:\Windows\system32\wuauclt.exe The NTVDM CPU has encountered an illegal instruction. CS:0568 IP:fbd3 OP:d9 8a 00 00 00 Chose Close to terminate the application
  2. Windows\system32\wuauclt.exe continuous pop up __16 bit MS-DOS Subsytem error message: C:\Windows\system32\wuauclt.exe__The NTVDM CPU has encountered an illegal instruction.
  3. System shutdown and reboot after a few hours with wuauclt.exe error message

Wuauclt.exe failure to work

  1. Wuauclt.exe has stopped working.
  2. Wuauclt.exe runs several times a day, stops my computer from working correctly.
  3. Wuauclt.exe has encountered a problem and needs to close.
  4. Windows update fails to initialize wuauclt.exe and Window Update won't run.

What are causes of wuauclt.exe errors?

If drivers like wuauclt.exe is corrupted due to improper uninstall and reinstall of the related program or files, then the wuauclt.exe will occur.

There's a file called -AUMAGIC that has associated itself with WUAUCLT.EXE in the setupapi.log that changes directories often. It can be found by reviewing the firewall logs. That is very suspect. No files found by that name. If you find it in registry as an Explorer toolbar, it is likely adware. Deleting it causes problems with AutoUpdate.

This malware hangs up internet connection. It imitates wuauclt.exe and camouflage itself as WUAUCLT.EXE, so most of the antivirus and removal spyware can't detect them. If you have turnoff autoupdate and the WUAUCLT.EXE is running, you are infected. There is a file wuaclt.exe created in a USB drive and also on other drivers and there is an autorun file as well, which contains: [AuToRuN] UsEAUtOpLaY=1 ShElL\OpEn=Open SHELL\OpEn\CoMmAnD=Temp1324\wuaclt.exe OPEN=Temp1324\wuaclt.exe. This application hides all your folders in the root dir and creates new files .exe using the folders' names.

Solutions to fixing wuauclt.exe errors

Method one

For people with a slow internet connection, on the Windows Update page in Internet Explorer, click the Personalize Windows Update link under Other Options, turn on the 'Display the link to the Windows Update Catalog under See Also option, and then click Save Settings. Then click Windows Update Catalog to view the listing of downloadable updates and any applicable instructions.

Method two

Sometimes, sfc/scannow is not able to solve this issue, but got Windows Resource Protection found corrupt files but was unable to fix some of them. You can try to disable wuauclt.exe at this moment. Turning off auto update via control panel does not stop it from running. To keep it from running do the following run- services.msc- Automatic Updates- Startup Type- Disable. Then you will know the problem is caused by virus if the error remains.

Method three

Firstly replace the corrupted wuauclt.exe file by means of DLL TOOL, and you will be ensured to stay away from malware infection. DLL TOOL has a reliable database of dll files including wuauclt.exe; besides, it is able to repair any damage to the associated registry keys.

Coming next is to kill virus/Trojan. The problem is that your Antivirus (AV) is somehow interfering with wuauclt.exe. Disable the AV as much as you can. At least turn off real-time file system protection. Open Task Manager and then go to Windows Update. Wuauclt.exe should start. Monitor it in Task Manager and see how much it uses in terms of CPU percentage.

If disabling the AV fixes your problem, you have two options: (a) find out how to configure you AV to stop this behavior or (b) remove it entirely from your system and get a less intrusive AV. Option (b) is preferable to go with. Then it is recommended to use DLL TOOL to catch the virus, because it has the Trojan listed within itself and can exactly remove a Trojan by recovering the inflicted registry keys.

Then it is time to fix registry errors. Windows Registry determines how the system and applications run or work. If you delete other registry entry by mistake, you may get another new wuauclt.exe error popup. So it's recommended that you use an automatic registry cleaning tool like DLL TOOL to resolve invalid registry entries and regularly clean the system.