The symim.sys process is the driver file for the Symantec NDIS Intermediate Driver or SymIMMP. It is part of the software Symantec Security Drivers (also known as SymNet or SymNet x64) from Symantec Corporation. The Network Driver Interface Specification (NDIS) acts like a middle-person between protocol drivers (like TCP or IP) and the driver of the Network Interface Card (NIC). As a virtual adapter, it shows itself to the NIC driver as if it were the protocol driver and vise-versa. Symantec Corporation digitally signed this file via the Symantic Symantec Time Stamping Services. The driver is commonly found in C:\Windows\System32\drivers, with half of its occurrences occupying 36,400 bytes of space. Symim.sys is not a system file for Windows and is generally considered to be reliable. The Windows Control Panel allows users to remove the entire SymNet program. This driver has minimal occurrences as threat.

Most non-system processes that are running can be stopped because they are not involved in running your operating system. symim.sys. is used by Symantec NDIS Intermediate Driver Module, If you shut down symim.sys, it will likely start again at a later time either after you restart your computer or after an application start. To stop symim.sys, permanently you need to uninstall the application that runs this process which in this case is Symantec NDIS Intermediate Driver Module, from your system.

After uninstalling applications it is a good idea to scan you Windows registry for any left over traces of applications. Registry Reviver by ReviverSoft is a great tool for doing this.

The ReviverSoft experts have not yet reviewed symim.sys

A process usually a part of an installed application such as Symantec NDIS Intermediate Driver Module, or your operating system that is responsible for running in functions of that application. Some application require that they have processes running all the time so they can do things such as check for updates or notify you when you get an instant message. Some poorly written applications have many processes that run that may not be required and take up valuable processing power within your computer.

We have not received any complaint about this process having higher than normal impact on PC performance. If you have had bad experiences with it please let us know in a comment below and we will investigate it further.

The first thing you should do if symim.sys. is causing errors on your computer is to run a Windows registry scan with Registry Reviver If you are still seeing errors after this you should uninstall the program that symim.sys, belongs to, in this case Symantec NDIS Intermediate Driver Module