What is GRTdiMon?

GRTdiMon.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 GRTdiMon.sys is a Windows system file or if it belongs to an application that you can trust.

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

GRTdiMon.sys file information

The process known as GRTdiMon TDI Filter Driver belongs to software Aluria Firewall or GR TDI Mon or Firewall or Cox High Speed Internet by Authentium ( or Global RISC (

Description: GRTdiMon.sys is not essential for Windows and will often cause problems. GRTdiMon.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 20,480 bytes (60% of all occurrences), 32,256 bytes or 36,864 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program is not visible. The service has no detailed description. GRTdiMon.sys is not a Windows core file. The software can be removed using the Control Panel's Add\Remove programs applet. GRTdiMon.sys appears to be a compressed file. Therefore the technical security rating is 24% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you want to remove the program completely, go to Control Panel ⇒ Software ⇒ Aluria Firewall or Firewall.

Recommended: Identify GRTdiMon.sys related errors

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

this could be probably a spyware..
earthlink was sending me spam mail through IM even though I no longer had earth link... then they had me down load this stuff and it is on my screen
  g campbell  
Part of Aluria security suite firewall
  ROAMER   (further information)

Rating chart

Summary: Average user rating of GRTdiMon.sys: based on 7 votes with 4 user comments. 4 users think GRTdiMon.sys is essential for Windows or an installed application. One user suspects danger. 2 users think GRTdiMon.sys is dangerous and recommend removing it.

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Best practices for resolving GRTdiMon issues

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

GRTdiMon.sys [all]