What is dnsapi.dll?

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

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Dnsapi.dll file information

The process known as DNS Client API DLL belongs to software Microsoft Windows Operating System or Betriebssystem Microsoft Windows by Microsoft (

Description: The original dnsapi.dll is an important part of Windows and rarely causes problems. Dnsapi.dll is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 270,336 bytes (36% of all occurrences), 147,968 bytes, 148,480 bytes or 461,312 bytes. 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior. The program is not visible. Dnsapi.dll is a trustworthy file from Microsoft. The service has no detailed description. The file is not a Windows core file. Therefore the technical security rating is 36% dangerous, however you should also read the user reviews.

Recommended: Identify dnsapi.dll related errors

Important: Some malware camouflages itself as dnsapi.dll, for example RDN/Generic.dx (detected by McAfee), and TROJ_GEN.R047C0DCB16 or PTCH_NOPLE.SM (detected by TrendMicro). Therefore, you should check the dnsapi.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

dnsapi.dll is a module that contains functions used by the DNS Client API.
window xp error DMSAPI
A dnsapi.dll fault prevented any browsers from opening (Win 10) but did not stop data transfer.
Risk name: Trojan.Win32.Generic!BT Source: Scanner Risk level: High Risk category: Trojan Description: Trojan is a general term for malicious software that is installed under false or deceptive pretenses or is installed without the user's full knowledge and consent. Most Trojans exhibit some form of malicious, hostile, or harmful functionality or behavior. Advice: This is a high risk and should be removed immediately as it may compromise your privacy and security, make dangerous changes to your computer's settings without your knowledge and consent, or severely degrade your computer's performance and stability. if located in the C:\windows\SysWOW64\dnsapi.dll
  Spencer   (further information)
Caused "limited" connectivity issues
dnsapi.dll can be hijacked and replaced by a virused copy, even in SysWOW64 or System32, running MalwareBytes Antirootkit and MalwareBytes AntiMalware would help to tell if you have an infected copy or a legit copy.

Rating chart

Summary: Average user rating of dnsapi.dll: based on 7 votes with 6 user comments. 4 users think dnsapi.dll is essential for Windows or an installed application. 2 users think it's probably harmless. One user thinks dnsapi.dll is dangerous and recommends removing it.

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Best practices for resolving dnsapi issues

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

dnsapi.dll [all]