What is oaui.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 oaui.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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Oaui.exe file information

Windows Task Manager with oaui
Oaui.exe process in Windows Task Manager

The process known as Online Armor Component belongs to software Emsisoft Online Armor or Online Armor Security Suite or Online Armor Firewall or Online Armor Premium by Emsisoft GmbH or Tall Emu ( or Emsi Software GmbH (

Description: Oaui.exe is not essential for the Windows OS and causes relatively few problems. The file oaui.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 7,558,464 bytes (37% of all occurrences), 2,415,104 bytes and 13 more variants. 
Oaui.exe is not a Windows system file. It can change the behavior of other programs or manipulate other programs. The file is certified by a trustworthy company. The program is not visible. Oaui.exe is able to connect to the Internet, record keyboard and mouse inputs, monitor applications and manipulate other programs. Therefore the technical security rating is 52% dangerous, however you should also read the user reviews.

Uninstalling this variant: You can uninstall the program Online Armor, update it, or ask Customer Support for help. Go to to update it, go to for support, or go to Online Armor in Windows Control Panel (Software or Programs section) to uninstall it.

Recommended: Identify oaui.exe related errors

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

Used by Armour Firewall
  James   (further information)
oaui.exe is part of Online Armor firewall or security suite. It is a startup program and is normally found in the %programfiles%\tall emu\online armor folder.

Summary: Average user rating of oaui.exe: based on 3 votes with 2 user comments. 3 users think oaui.exe is essential for Windows or an installed application.

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Best practices for resolving oaui issues

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

oaui.exe [all]