What is flcss.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 flcss.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.

Click to Run a Free Scan for flcss.exe related errors

Flcss.exe file information

The process known as AntiFun belongs to software F-Secure Anti-Virus by F-Secure (

Description: Flcss.exe is not essential for Windows and will often cause problems. Flcss.exe is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 29,696 bytes (83% of all occurrences) or 61,440 bytes. 
There is an icon for this program on the taskbar next to the clock. The program has a visible window. It is not a Windows core file. The flcss.exe file is an unknown file in the Windows folder. Flcss.exe is able to monitor applications. Therefore the technical security rating is 30% dangerous, however you should also read the user reviews.

Recommended: Identify flcss.exe related errors

Important: Some malware camouflages itself as flcss.exe. Therefore, you should check the flcss.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

i use NOD32 :: C:\WINDOWS\system32\flcss.exe - probably unknown NewHeur_PE virus [7]
  Alghzawi, MK.  
popupp every time I start the computer

Summary: Average user rating of flcss.exe: based on 1 vote with 2 user comments. One user thinks flcss.exe is dangerous and recommends removing it. One user is not sure about it.

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Best practices for resolving flcss issues

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

flcss.exe [all]