What is AOLAcsd.exe?

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 AOLAcsd.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.

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AOLAcsd.exe file information

Windows Task Manager with AOLAcsd
AOLAcsd.exe process in Windows Task Manager

The process known as AOL Connectivity Service belongs to software AOL Uninstaller or AOL Connectivity Services or AOL Connectivity Service or America Online or AOL by AOL ( or America Online (

Description: AOLAcsd.exe is not essential for Windows and will often cause problems. The file AOLAcsd.exe is located in a subfolder of "C:\Program Files\Common Files" (typically C:\Program Files\common files\aol\acs\). Known file sizes on Windows 10/8/7/XP are 46,640 bytes (71% of all occurrences), 1,135,728 bytes and 5 more variants. 
The program is not visible. The file is not a Windows core file. It is a Verisign signed file. AOLAcsd.exe is certified by a trustworthy company. AOLAcsd.exe is able to connect to the Internet, hide itself and monitor applications. Therefore the technical security rating is 28% dangerous; however you should also read the user reviews.

Uninstalling this variant: If you run into problems with AOLAcsd.exe, you can contact Customer Service, update the program to the latest version or safely remove the program using the uninstall program of AOL Internet Software or AOL Connectivity Services (Control Panel ⇒ Uninstall a Program).

Recommended: Identify AOLAcsd.exe related errors

If AOLAcsd.exe is located in a subfolder of the user's "Documents" folder, the security rating is 66% dangerous. The file size is 46,640 bytes. It can change the behavior of other programs or manipulate other programs. The program is not visible. AOLAcsd.exe is a Verisign signed file. AOLAcsd.exe is digitally signed. The process listens for or sends data on open ports to a LAN or the Internet. AOLAcsd.exe is not a Windows system file.

External information from Paul Collins:

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

if u have one click fix right click the aol icon and click one click fix and scroll down to connectivity/ repair acs and boom no more 100% cpu usage
as soon as my comp logged on it would keep poppin up- and rebooting didnt help. was bad. had to delete anything aol. prob gone.
There are 2 ways to deal with this file.. firstly if you have xp pro disable aol connectivity services there or if you have xp home disable aol connectivity services using msconfig and then in ms config disable the AOLDial in start up..this cpu hogging piece of ****will not bother you anymore. It is basically a reconnection utility at the expense of all your cpu power
I don't like it. I run a small business & use the same telephone line for the Internet, the Fax, and other services that I use throughout the day. I want to be able to turn off my internet connection so that fax calls can get through. I do not leave my computer turned on during the night & this program messes that up. After reading other's responses, I assume that this is what has slowed my computer down to a "real crawl". It is NOT a good program for my small business.
hogs cpu % and prevents linking to web pages by point and click. Web page addresses must be entered manually to access.
  Joe Weddington  
reinstall the the old version of 9.0 the new version is going crazy
  aol fix it mofo  
takes up 700,000kb of virtual memory
AOL connection daemon, if your CPU goes to 100% with this process, it is likely your AOL ACS directory is corrupted. To fix this problem, download the AOL one click and reinitialize the directory.
  Alfred Wong  
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of AOLAcsd.exe: based on 38 votes with 9 reviews. 6 users think AOLAcsd.exe is essential for Windows or an installed application. 2 users think it's probably harmless. 7 users think it's neither essential nor dangerous. 7 users suspect danger. 16 users think AOLAcsd.exe is dangerous and recommend removing it. 4 users don't grade AOLAcsd.exe ("not sure about it").

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Best practices for resolving AOLAcsd issues

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

AOLAcsd.exe [all]