What is Slnthal?

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

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

Slnthal.sys file information

The process known as HAL driver or HAL Driver for NT belongs to software Modem or Soft Modem or Modem for windows NT by Smart Link (

Description: Slnthal.sys is an important part of Windows, but often causes problems. Slnthal.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 95,768 bytes (16% of all occurrences), 85,968 bytes and 4 more variants. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The application has no file description. The program has no visible window. There is no detailed description of this service. The program is not active. Therefore the technical security rating is 6% dangerous, however you should also read the user reviews.

Recommended: Identify Slnthal.sys related errors

If Slnthal.sys is located in a subfolder of C:\Windows\System32\drivers, the security rating is 17% dangerous. The file size is 101,328 bytes (50% of all occurrences) or 101,136 bytes. The application has no file description. The program is not visible. The service has no detailed description. The Slnthal.sys file is not a Windows system file. Slnthal.sys appears to be a compressed file.

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

moden driver for NetoDragon
  ptp   (further information)
Driver for SmartLink Modem Software
b709611e base @b7085000, datestamp 4017b880
  brian Ottewill  
Smartlink modem driver file. Periodically causes Windows XP SP2 to Blue Screen. Can't seem to find an updated driver.
sinthal is place of god

Rating chart

Summary: Average user rating of Slnthal.sys: based on 11 votes with 5 user comments. 6 users think Slnthal.sys is essential for Windows or an installed application. 3 users suspect danger. 2 users think Slnthal.sys is dangerous and recommend removing it. One user is not sure about it.

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Best practices for resolving Slnthal issues

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

Slnthal.sys [all]