What is aa.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 aa.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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Aa.exe file information

Windows Task Manager with aa
Aa.exe process in Windows Task Manager

The process known as ctjjn appears to belong to software Digidesign Pro Tools® LE or wfcecxkwnaro by tcchhrifws or Digidesign, A Division of Avid Technology (

Description: Aa.exe is not essential for the Windows OS and causes relatively few problems. Aa.exe is located in a subfolder of "C:\Program Files\Common Files". The file size on Windows 10/8/7/XP is 55,296 bytes. 
There is no information about the author of the file. The program is not visible. The software listens for or sends data on open ports to a LAN or the Internet. The file is not a Windows core file. Therefore the technical security rating is 74% dangerous.

Recommended: Identify aa.exe related errors

If aa.exe is located in a subfolder of "C:\Program Files", the security rating is 42% dangerous. The file size is 49,152 bytes. The program is not visible. The file is not a Windows core file.

Uninstalling this variant: It is possible to uninstall the program using the Control Panel ⇒ Uninstall a ProgramDigidesign Pro Tools® LE.

If aa.exe is located in a subfolder of Windows folder for temporary files, the security rating is 70% dangerous. The file size is 295,936 bytes. The program has no visible window. It is not a Windows core file.

Important: Some malware also uses the file name aa.exe, for example TROJ_GEN.F0C2C00LI14 (detected by TrendMicro), and Trojan.Win32.Llac.jomv (detected by Kaspersky). Therefore, you should check the aa.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.


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Best practices for resolving aa issues

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

aa.exe [all]