What is st330service.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 st330service.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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St330service.exe file information

Windows Task Manager with st330service
St330service.exe process in Windows Task Manager

The process known as SpeedTouch Host Service belongs to software Host Service or SpeedTouch (version 330) by THOMSON Telecom Belgium (

Description: St330service.exe is not essential for the Windows OS and causes relatively few problems. St330service.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 389,215 bytes (70% of all occurrences), 581,632 bytes or 634,880 bytes. 
The program is not visible. St330service.exe is not a Windows system file. The application listens for or sends data on open ports to a LAN or the Internet. Therefore the technical security rating is 54% dangerous.

Uninstalling this variant: If any problems with st330service.exe occur, you may also want to uninstall SpeedTouch 330 from your computer using the Control Panel applet Uninstall a Program.

Recommended: Identify st330service.exe related errors

Important: Some malware camouflages itself as st330service.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the st330service.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 st330service issues

A clean and tidy computer is the key requirement for avoiding problems with st330service. 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 st330service.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

st330service.exe [all]