What is Sf.bin?

Please read below to decide for yourself whether the Sf.bin 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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Sf.bin file information

The process known as avast! Emulation Engine belongs to software avast! Free Antivirus or avast! Internet Security by AVAST Software (

Description: Sf.bin is not essential for the Windows OS and causes relatively few problems. The file Sf.bin is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 540,168 bytes (50% of all occurrences) or 478,720 bytes. 
The program is not visible. Sf.bin is not a Windows core file. Sf.bin is able to record keyboard and mouse inputs, monitor applications and manipulate other programs. Therefore the technical security rating is 39% dangerous.

Uninstalling this variant: In case you experience problems using Sf.bin, you can completely remove avast! Internet Security or avast! Free Antivirus (Control Panel ⇒ Uninstall a Program).

Recommended: Identify Sf.bin related errors

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

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

Sf.bin [all]