What is acs.exe?

The genuine acs.exe file is a software component of Atheros Configuration Service by Qualcomm Atheros.
Atheros Configuration Service is a configuration tool for Atheros wireless devices. Acs.exe launches the Atheros Configuration Service program. This is not an essential Windows process and can be disabled if known to create problems. Atheros Configuration Service is installed with Atheros Wireless LAN hardware. The program features additional options for configuration of these devices. This program only supports the Windows platform. Qualcomm Atheros (formerly known as T-Span Systems and Atheros Communications) is an American corporation that designs and develops semiconductor technology for network communications, specialising in wireless chipsets. The company was founded in 1998 by Teresa Meng and John L. Hennessy. Qualcomm acquired the company in 2011 for $3.7 billion making it a subsidiary and changing the name to Qualcomm Atheros.

ACS stands for Agnitum Configuration Service

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the acs.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

Click to Run a Free Scan for acs.exe related errors

Acs.exe file information

Windows Task Manager with acs
Acs.exe process in Windows Task Manager

The process known as Agnitum Outpost Service or Atheros Configuration Service or ACU Configuration Service or D-Link Configuration Service or 802.11 WLAN Configuration Service or Ekahau Configuration Service or Belkin Wireless Utility

belongs to software Atheros Configuration Service (ACS) or Atheros Configuration Service or ACU Configuration Service or Agnitum Outpost Firewall Pro or Outpost Firewall (version 2009) or D-Link Wireless G WNA-1330 or Belkin Wireless Utility or Agnitum Outpost Security

by Atheros or Agnitum ( or NETGEAR ( or Belkin ( or TRENDnet or SMC.

Description: Acs.exe is not essential for the Windows OS and causes relatively few problems. The acs.exe file is located in the C:\Windows\System32 folder or sometimes in a subfolder of C:\. Known file sizes on Windows 10/8/7/XP are 36,864 bytes (53% of all occurrences), 364,629 bytes and 24 more variants. 
There is no information about the author of the file. The program is not visible. The file is not a Windows core file. Acs.exe is an unknown file in the Windows folder. Acs.exe is able to hide itself. Therefore the technical security rating is 71% dangerous, however you should also read the user reviews.

Uninstalling this variant: You have the option to do the following:
  1) uninstall Outpost Firewall or D-Link RangeBooster from your computer using the Control Panel applet Uninstall a Program
  2) contact Customer Service [1][2]
  3) search for an update [1][2] on the vendor’s website.

Recommended: Identify acs.exe related errors

Important: Some malware camouflages itself as acs.exe. Therefore, you should check the acs.exe 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

Agnitum Outpost Firewall - agnitum control service = acs.exe, a Windows' service Disable the service (if it's not self-protected) and Agnitum Firewall will stop to work.
  roman   (further information)
Assetto Corsa
its safe and importiant for running various of programs
  Shady Kamal  
Got this when U-Verse was installed, to enable wireless capabilities for my desktop computer.
didntblock my net after blocking it installed pc tools firewall and it was the second first popup aftrer installing the firewall, aftrer the new network setting was popped before it. if this message gets there, i can still be online with my wireless card in a tower after blocking its bad ass.
agnitum outpost firewall process
Used for NetGear N150 Wireless USB Adapter
  Jeremy O  
It's a configuration service that is not related to any malicious program. Just like most ppl who posted here had said, it's AtherosConfigService. Part of the drivers set for WLAN cards, USB adapter's ect....In my case, it's a Belkin WLAN PCI card. It's harmless.
  Jzee420   (further information)
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of acs.exe: based on 167 votes with 9 reviews. 120 users think acs.exe is essential for Windows or an installed application. 9 users think it's probably harmless. 25 users think it's neither essential nor dangerous. 6 users suspect danger. 7 users think acs.exe is dangerous and recommend removing it. 12 users don't grade acs.exe ("not sure about it").

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Best practices for resolving acs issues

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

acs.exe [all]