What is AGRSM?

The genuine AGRSM.sys file is a software component of Agere Systems Soft Modem by Agere Systems.
Soft modem offers logic to provide robust ring detection and qualification to eliminate unintended wake-on-ring events resulting from activity on a phone line other than ringing. It also handles pulse dial timing control to eliminate system timing dependencies that were common with earlier soft modem products. Originally called Lucent Technologies in 2002, Agere was merged into LSI Corporation in 2007. LSI was recently acquired by Avago Technologies earlier in 2014.

AgrSM stands for Agere Systems Soft Modem

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

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

AGRSM.sys file information

The process known as SoftModem Device Driver or Agere Systems Soft Modem belongs to software Agere Systems Soft Modem or Agere SoftModem Driver or TOSHIBA (version V92 Software Modem) by Agere Systems ( or LSI (

Description: AGRSM.sys is not essential for the Windows OS and causes relatively few problems. AGRSM.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 1,268,204 bytes (19% of all occurrences), 1,066,278 bytes and 16 more variants. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. There is no detailed description of this service. It is not a Windows system file. AGRSM.sys is a trustworthy file from Microsoft. AGRSM.sys appears to be a compressed file. Therefore the technical security rating is 17% dangerous, however you should also read the user reviews.

Recommended: Identify AGRSM.sys related errors

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

It is for the Toshiba Soft Modem. I was just trying to look up the speed of my modem actually.
Affected a Toshiba machine, device driver:Modem
It is a default PC modem driver
toshiba software
needed to install Modem in Laptop
  Lexx Killeen  
modem driver

Rating chart

Summary: Average user rating of AGRSM.sys: based on 14 votes with 8 user comments. 10 users think AGRSM.sys is essential for Windows or an installed application. 2 users think it's probably harmless. 2 users think it's neither essential nor dangerous. One user is not sure about it.

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Best practices for resolving AGRSM issues

A clean and tidy computer is the key requirement for avoiding problems with AGRSM. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic 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 6resmon 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 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the AGRSM.sys process on your computer, the following programs have proven to be helpful: ASecurity 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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

AGRSM.sys [all]