What is oocinst.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 oocinst.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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Oocinst.exe file information

The process known as O&O ComponentInstaller Agent or O&O ComponentInstaller Agent (Win32) belongs to software O&O Enterprise Management Console by O&O Software GmbH (

Description: Oocinst.exe is not essential for the Windows OS and causes relatively few problems. Oocinst.exe is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 663,552 bytes (60% of all occurrences), 651,264 bytes or 638,976 bytes. 
The program has no visible window. Oocinst.exe is not a Windows core file. The file is an unknown file in the Windows folder. The application uses ports to connect to or from a LAN or the Internet. Oocinst.exe is able to connect to the Internet and record keyboard and mouse inputs. Therefore the technical security rating is 57% dangerous, however you should also read the user reviews.

Uninstalling this variant: You may also uninstall the software O&O Defrag Server Edition using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program).

Recommended: Identify oocinst.exe related errors

Important: Some malware disguises itself as oocinst.exe, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the oocinst.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

O&O Defrag Komponenten-Installer ServerVersion
  Eisbergle   (further information)

Summary: Average user rating of oocinst.exe: based on 1 vote with 1 user comment. One user thinks oocinst.exe is essential for Windows or an installed application.

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Best practices for resolving oocinst issues

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

oocinst.exe [all]