What is FHook.dll?

FHook.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. The following information can help you determine if FHook.dll is a Windows system file or if it belongs to an application that you can trust.

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FHook.dll file information

The process known as fhook belongs to software SurfinGuard / SurfinShield by Finjan Software (

Description: FHook.dll is not essential for Windows and will often cause problems. The file FHook.dll is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 171,584 bytes (50% of all occurrences), 118,867 bytes or 98,304 bytes. 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior. The program has no visible window. There is no detailed description of this service. It can change the behavior of other programs or manipulate other programs. The FHook.dll file is not a Windows system file. The software starts when Windows starts (see Registry key: AppInit_DLLs). FHook.dll is able to monitor applications and manipulate other programs. Therefore the technical security rating is 83% dangerous, however you should also read the user reviews.

Recommended: Identify FHook.dll related errors

Important: Some malware camouflages itself as FHook.dll. Therefore, you should check the FHook.dll 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

Reported to be spyware by Aluria spyware remover
part of finjan safe guard - kernel driver - if removed save guard crashes
  simon - admin-at-vulcannonibird-dot-de  
wird von "finjan safe guard" installiert, protokolliert Systemereignisse - Spionagefunktion ungewiss!?

Summary: Average user rating of FHook.dll: based on 3 votes with 3 user comments. One user thinks FHook.dll is essential for Windows or an installed application. One user thinks it's neither essential nor dangerous. One user suspects danger.

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Best practices for resolving FHook issues

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

FHook.dll [all]