What is advapi32.dll?

Advapi32.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. You can fix your advapi32.dll problem by downloading the correct advapi32.dll file. The following information can help you determine if advapi32.dll is a Windows system file or if it belongs to an application that you can trust.

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Advapi32.dll file information

The process known as Advanced Windows (version 32 Base API) belongs to software Windows Management Instrumentation Driver Extensions (Wmi) or Microsoft Windows Operating System by Microsoft (

Description: Advapi32.dll is not essential for Windows and will often cause problems. The advapi32.dll file is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 617,472 bytes (33% of all occurrences), 616,960 bytes, 640,000 bytes, 686,592 bytes or 687,616 bytes. 
The service can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. It is a trustworthy file from Microsoft. Advapi32.dll is not a Windows core file. The process is not active. Therefore the technical security rating is 0% dangerous, however you should also read the user reviews.

Recommended: Identify advapi32.dll related errors

Important: Some malware disguises itself as advapi32.dll, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the advapi32.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 Treiber mit der Bezeichnung ADVAPI.DLL ermöglicht und kontrolliert eine ganze Reihe von Sicherheitsfunktionen. Inzwischen ist aber klar, dass ADVAPI spezielle Programme beinhaltet, die von der NSA dort installiert wurden und von ihr auch kontrolliert werden.
  Berni Karich   (further information)
nicht viel, aber ich habe dieses hier entdeckt:
  Jochen2707   (further information)
NSA spyware
  Larry   (further information)
showed up as a news dowqnload in startup thesame day my laptop was clobbered with a virus...'cryptoloc '
I know i need it in windows 7 to clean my ram i cant clean my ram with out it and i accidently deleted it and cleared my trash too. i had 2 advapi.dll files but one was ADVAPI32.DLL.EXE that was malware i had to remove i didnt know i deleted them both til i needed the real onw.
It is infact used by the NSA. The file is dangerous and should be removed from your computer. Computer security specialists have been aware for two years that unusual features are contained inside a standard Windows software "driver" used for security and encryption functions. The driver, called ADVAPI.DLL, enables and controls a range of security functions. If you use Windows, you will find it in the C:\Windows\system directory of your computer. ADVAPI.DLL works closely with Microsoft Internet Explorer, but will only run cryptographic functions that the US governments allows Microsoft to export. That information is bad enough news, from a European point of view. Now, it turns out that ADVAPI will run special programmes inserted and controlled by NSA. As yet, no-one knows what these programmes are, or what they do. Dr Nicko van Someren reported at last year's Crypto 98 conference that he had disassembled the ADVADPI driver. He found it contained two different keys. One was used by Microsoft to control the cryptographic functions enabled in Windows, in compliance with US export regulations. But the reason for building in a second key, or who owned it, remained a mystery.
  Jacob Lageveen   (further information)

Rating chart

Summary: Average user rating of advapi32.dll: based on 7 votes with 6 user comments. 2 users think advapi32.dll is essential for Windows or an installed application. 3 users suspect danger. 2 users think advapi32.dll is dangerous and recommend removing it. One user is not sure about it.

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Best practices for resolving advapi32 issues

A clean and tidy computer is the key requirement for avoiding problems with advapi32. 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 advapi32.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

advapi32.dll [all]