What is swi_service.exe?

The genuine swi_service.exe file is a software component of Sophos Anti-Virus by Sophos Limited.
"swi_service.exe" is part of Sophos Antivirus by Sophos Limited. It is the Sophos Web Intelligence process for the software, which monitors websites that are visited and prevents hijacking from any malicious websites. The file uses port 80 to contact its cloud servers through external IP addresses multiple times a day to submit samples collected by the software. Basically, this file monitors the web and handles website security for a safer visit. Sophos Limited has been around since 1987 with anti-virus and encryption applications for businesses and consumers. Today, they are a worldwide provider of security applications related to endpoint technology, email protection, network security, and encryption.

SWI_Service stands for Sophos Web Intelligence_Service

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 swi_service.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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Swi_service.exe file information

Windows Task Manager with swi_service
Swi_service.exe process in Windows Task Manager

The process known as Sophos Web Intelligence belongs to software Sophos Anti-Virus by Sophos or Sophos Plc (

Description: Swi_service.exe is not essential for the Windows OS and causes relatively few problems. Swi_service.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 1,543,704 bytes (25% of all occurrences), 2,890,232 bytes, 3,274,536 bytes or 2,863,168 bytes. 
The software can be removed using the Control Panel's Add\Remove programs applet. The program has no visible window. It is a Verisign signed file. The file has a digital signature. It is not a Windows system file. Swi_service.exe is able to monitor applications. Therefore the technical security rating is 17% dangerous.

Uninstalling this variant: If you experience any issues with installation of swi_service.exe, you can do the following:
  1) uninstall Sophos Anti-Virus software via Windows Control Panel/Add or Remove Programs (Windows XP) or Programs and Features (Windows 10/8/7)
  2) ask for help from Support
  3) look for a new, improved version.

Recommended: Identify swi_service.exe related errors

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

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

swi_service.exe [all]