What is SymIM?

SymIM.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if SymIM.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for SymIM drivers in need of updating

SymIM.sys file information

The process known as NDIS Intermediate Driver or SymIMMP belongs to software Symantec Security Drivers or SymIMMP or SymNet or SymNet x64 by Symantec (

Description: SymIM.sys is not essential for the Windows OS and causes relatively few problems. The SymIM.sys file is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 36,400 bytes (50% of all occurrences), 31,280 bytes, 44,024 bytes or 31,408 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program is not visible. The SymIM.sys file is a Verisign signed file. The file is a trustworthy file from Microsoft. The file is certified by a trustworthy company. There is no detailed description of this service. The SymIM.sys file is not a Windows system file. SymIM.sys appears to be a compressed file. Therefore the technical security rating is 0% dangerous, however you should also read the user reviews.

Uninstalling this variant: You could remove the entire program SymNet using Windows Control Panel.

Recommended: Identify SymIM.sys related errors

Important: Some malware disguises itself as SymIM.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the SymIM.sys 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

symim.sys is part of Symantec Security located in C:\WINDOWS\system32\drivers\symim.sys

Summary: Average user rating of SymIM.sys: based on 1 vote with 1 user comment. One user thinks SymIM.sys is essential for Windows or an installed application.

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Best practices for resolving SymIM issues

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

SymIM.sys [all]