What is wuauserv.dll?

Wuauserv.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. The following information can help you determine if wuauserv.dll is a Windows system file or if it belongs to an application that you can trust.

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Wuauserv.dll file information

The process known as Windows Update AutoUpdate Service belongs to software Microsoft Windows Operating System by Microsoft (

Description: Wuauserv.dll is not essential for Windows and will often cause problems. Wuauserv.dll is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 6,656 bytes (22% of all occurrences), 25,944 bytes and 6 more variants. 
The service can be started or stopped from Services in the Control Panel or by other programs. The program is not visible. Wuauserv.dll is not a Windows core file. The file has a digital signature. wuauserv.dll appears to be a compressed file. Therefore the technical security rating is 18% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you experience any issues with installation of wuauserv.dll, you can also uninstall the associated program (Start > Control Panel > Uninstall a Program > Windows) or turn to the software developer, Microsoft, for advice.

Recommended: Identify wuauserv.dll related errors

If wuauserv.dll is located in a subfolder of "C:\Program Files", the security rating is 1% dangerous. The file size is 6,656 bytes. The program is not visible. The file is a trustworthy file from Microsoft. The file is not a Windows system file.

Important: Some malware disguises itself as wuauserv.dll, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the wuauserv.dll process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

Der Dienst "wuauserv" ist für die Installation, Erkennung und das Herunterladen von Windows Updates zuständig. Der Dienst wird für die Funktion"Windows Updates" und "Automatische Updates" benötigt. Weiterhin wird der Dienst noch von Programmen benötigt, die über die "Windows Update Agent-Programmierschnittstelle" (WUA) arbeiten.
  Smilez   (further information)
Let mount processor temperature in the regions of 60 until over 80 degrees C,takes also CPU usage permanently 30 % when active, stopping it brings the computer W7 back to normal.

Summary: Average user rating of wuauserv.dll: based on 2 votes with 2 user comments. One user thinks wuauserv.dll is essential for Windows or an installed application. One user suspects danger.

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Best practices for resolving wuauserv issues

A clean and tidy computer is the key requirement for avoiding problems with wuauserv. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the wuauserv.dll process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

wuauserv.dll [all]