What is oldmcdonald.exe?

The genuine oldmcdonald.exe file is a software component of Autorun Eater by Old McDonald's Farm.
Oldmcdonald.exe is an executable file that belong to the Autorun Eater program, an security software designed to disable process that run automatically on system startup. This is not a critical Windows component and should be removed if known to cause problems. Autorun Eater is a freeware security program that detects malicious programs, including trojans and viruses that run on Windows startup. The latest version of Autorun Eater protects the system from malware attacks with anti-malware scanning capabilities which automatically scan and remove known malware threats.

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 oldmcdonald.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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Oldmcdonald.exe file information

The process known as Old McDonald belongs to software Autorun Eater by Old McDonald's Farm (

Description: Oldmcdonald.exe is not essential for the Windows OS and causes relatively few problems. The oldmcdonald.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 522,720 bytes (50% of all occurrences), 501,768 bytes, 549,400 bytes or 438,773 bytes. 
There is no description of the program. The file is not a Windows system file. The process can be removed using the Control Panel's Add\Remove programs applet. The software is loaded during the Windows boot process (see Registry key: MACHINE\Run). The program is not visible. Oldmcdonald.exe is able to record keyboard and mouse inputs, monitor applications and manipulate other programs. Therefore the technical security rating is 33% dangerous.

Uninstalling this variant: You have the option to consult Wordpress’s Customer Service, search for an update on the vendor’s website or uninstall the software Autorun Eater using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program).

Recommended: Identify oldmcdonald.exe related errors

If oldmcdonald.exe is located in a subfolder of the user's profile folder, the security rating is 64% dangerous. The file size is 516,216 bytes. The program can be removed using the Control Panel's Add\Remove programs applet. There is no description of the program. It can change the behavior of other programs or manipulate other programs. The program is not visible. The software starts upon Windows startup (see Registry key: MACHINE\Run). The file is not a Windows core file. Oldmcdonald.exe is able to record keyboard and mouse inputs, monitor applications and manipulate other programs.

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

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

oldmcdonald.exe [all]