What is au.exe?

The genuine au.exe file is a software component of Ace Utilities by Acelogix Software.
Au.exe is an executable file that runs Ace Utilities, a collection of utility programs designed for system maintenance and enhancing Windows' performance. This is not a critical Windows component and should be removed if known to cause problems. Ace Utilities features Unneeded File Remover that frees up disk space by removing unwanted clutter; Registry Cleaner that optimizes the registry; Startup Organizer that prevents spyware from stealing confidential data; History Eraser that cleans Internet history and cookies; Duplicate File Finder that finds and removes duplicate files; Dead Shortcut Fixer that fixes or removes dead shortcuts and Start menu errors; Uninstaller Plus that uninstalls applications that are hard to remove; Secure Delete that permanently deleting files and leaves no recoverable traces on the hard drive. Acelogix Software is a company that develops utility software for the Windows platform that enables computers to work more efficiently and securely. The company was established in 2002.

AU stands for Ace Utilities For System Maintenance

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 au.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 au.exe related errors

Au.exe file information

The process known as Acelogix Software's Ace Utilities For System Maintenance belongs to software Ace Optimizer Utilities or Ace Utilities Rus by Acelogix Software (

Description: Au.exe is not essential for the Windows OS and causes relatively few problems. The au.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 735,232 bytes (25% of all occurrences), 2,392,776 bytes, 1,815,552 bytes or 1,306,624 bytes. 
The program has a visible window. It is not a Windows system file. Au.exe is able to record keyboard and mouse inputs, hide itself and manipulate other programs. Therefore the technical security rating is 23% dangerous, however you should also read the user reviews.

Uninstalling this variant: In the event of any problems with au.exe, you can uninstall the software Ace Utilities using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program).

Recommended: Identify au.exe related errors

External information from Paul Collins:

Important: Some malware camouflages itself as au.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the au.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

Just the ACE Optimizer program
  Vanquish   (further information)
If in AppData LocalLow it is part of Oracle's Java Auto Update and can be gassed if you don't like sneaky auto updaters
  Mars Bonfire  

Summary: Average user rating of au.exe: based on 2 votes with 2 user comments. One user thinks au.exe is essential for Windows or an installed application. One user thinks it's neither essential nor dangerous. One user is not sure about it.

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Best practices for resolving au issues

A clean and tidy computer is the key requirement for avoiding problems with au. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic 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 resmon 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 DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the au.exe process on your computer, the following programs have proven to be helpful: Security 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. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

au.exe [all]