What is 3C_Atom.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 3C_Atom.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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3C_Atom.exe file information

The process known as 3C_Atom belongs to software 3Com 3C_Atom by 3Com (

Description: 3C_Atom.exe is not essential for the Windows OS and causes relatively few problems. The 3C_Atom.exe file is located in the C:\Windows folder. The file size on Windows 10/8/7/XP is 40,960 bytes. 
The file is an unknown file in the Windows folder. The program has no visible window. The software starts upon Windows startup (see Registry key: MACHINE\Run). The file is not a Windows system file. Therefore the technical security rating is 60% dangerous.

Recommended: Identify 3C_Atom.exe related errors

Important: Some malware camouflages itself as 3C_Atom.exe. Therefore, you should check the 3C_Atom.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 3C_Atom issues

A clean and tidy computer is the key requirement for avoiding problems with 3C_Atom. 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 3C_Atom.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

3C_Atom.exe [all]