What is asyncmac?

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

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

Asyncmac.sys file information

The process known as MS Remote Access serial network driver or Asynchroner RAS -Medientreiber belongs to software Microsoft Windows Operating System by Microsoft (

Description: Asyncmac.sys is an important part of Windows, but often causes problems. The asyncmac.sys file is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 14,336 bytes (75% of all occurrences), 17,920 bytes or 13,568 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The asyncmac.sys file is a Windows system file. The program is not visible. The asyncmac.sys file is a trustworthy file from Microsoft. Therefore the technical security rating is 1% dangerous, however you should also read the user reviews.

Recommended: Identify asyncmac.sys related errors

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

Kann Trojaner sein in C:\WINDOWS\system32\DRIVERS, C:\WINDOWS\ServicePackFiles\i386, Windows verlangt die System-CD nach Eingriff der Anti-Viren-Software ...
my avg 8.5 detected it as infected and wont delete it
Gave false positive with Spybot - XP recreates it if deleted
  William Elmer  
Loaris Trojan Remover detected something called packer.mimisync attached to asyncmac ... what is this? A password stealer?

Summary: Average user rating of asyncmac.sys: based on 3 votes with 4 user comments. One user thinks it's probably harmless. One user suspects danger. One user thinks asyncmac.sys is dangerous and recommends removing it. One user is not sure about it.

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Best practices for resolving asyncmac issues

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

asyncmac.sys [all]