What is dllhst3g.exe?

The genuine dllhst3g.exe file is a software component of Microsoft Windows Operating System by Microsoft.
A 3G host for Microsoft's COM+ Surrogate, this application uses your computers built-in or attached 3G connection. COM+ is a method of implementing a variety of functions via network connection in versions of Windows 2000 and later. Founded in 1975, Microsoft's flagship product is the Windows operating system, which is installed on over 90% of workstations worldwide.

DLLHst3G stands for DLL Host 3G

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 dllhst3g.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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Dllhst3g.exe file information

Windows Task Manager with dllhst3g
Dllhst3g.exe process in Windows Task Manager

The process known as COM Surrogate belongs to software Microsoft Windows Operating System by Microsoft (

Description: Dllhst3g.exe is not essential for Windows and will often cause problems. Dllhst3g.exe is located in a subfolder of the user's profile folder or sometimes in the Windows folder for temporary files or in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 81,920 bytes (35% of all occurrences), 61,440 bytes and 5 more variants. 
The program is not visible. The dllhst3g.exe file is not a Windows core file. There is no information about the author of the file. The program starts when Windows starts (see Registry key: win.ini, Run). Therefore the technical security rating is 66% dangerous; however you should also read the user reviews.

Recommended: Identify dllhst3g.exe related errors

Important: Some malware also uses the file name dllhst3g.exe, for example Trojan.Gen.2 or Downloader.Trojan (detected by Symantec), and Downloader-BOW or Artemis!8A6F88B3741E (detected by McAfee). Therefore, you should check the dllhst3g.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 Noticed a slowdown in my connection. Tracked this program down thru task manager, and killed it. Back to normal operations.
  Deathflame   (further information)

Summary: Average user rating of dllhst3g.exe: based on 1 vote with 1 user comment. One user suspects danger.

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Best practices for resolving dllhst3g issues

A clean and tidy computer is the key requirement for avoiding problems with dllhst3g. 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 dllhst3g.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

dllhst3g.exe [all]