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How to Download and Fix asyncmac.sys?

Sometimes Windows system displays error messages regarding corrupted or missing asyncmac.sys files. Situations like that can occur, for example, during a software installation process. Each software program requires certain resources, libraries, and source data to work properly. Corrupted or nonexistent asyncmac.sys file can therefore effect in failed execution of the started process.

asyncmac.sys file MS Remote Access serial network driver. The file was developed by for use with software. Here you will find detailed information about the file and instructions how to proceed in the event of asyncmac.sys related errors on your device. You can also download asyncmac.sys file compatible with Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista, Windows XP devices which will (most probably) allow you to solve the problem.

For Windows Compatible with: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista, Windows XP

File info

General information
Filename asyncmac.sys
File extension SYS
Description MS Remote Access serial network driver
Software
Program Microsoft® Windows® Operating System
Author Microsoft Corporation
Details
MIME type application/octet-stream
File type Driver
System Windows NT 32-bit
Copyrights © Microsoft Corporation. All rights reserved.
Character set Unicode
Language cod English (U.S.)
asyncmac.sys

There are various types of errors related to asyncmac.sys file. asyncmac.sys file may be located in wrong file directory on your device, may not be present in the system, or may be infected with malicious software and therefore not work correctly. Below is a list of most common error messages related to asyncmac.sys file. If you encounter one listed below (or similar), please consider the following suggestions.

  • asyncmac.sys is corrupted
  • asyncmac.sys cannot be located
  • Runtime Error - asyncmac.sys
  • asyncmac.sys file error
  • asyncmac.sys file cannot be loaded. Module was not found
  • cannot register asyncmac.sys file:
  • asyncmac.sys file could not be loaded
  • asyncmac.sys file doesn't exist

asyncmac.sys

Error

Application could not be started because asyncmac.sys file is missing. Reinstall the application to solve the problem.

OK

Problems related to asyncmac.sys can be addressed in various ways. Some methods are meant only for advanced users. If you don't have confidence in your skills, we suggest consulting a specialist. Fixing asyncmac.sys file errors should be approached with utmost caution for any mistakes can result in unstable or unproperly working system. If you have the necassary skills, please proceed.

asyncmac.sys file errors can be caused by various factors, so its is beneficial to try to fix them using various methods.

Step 1: Scan your computer for any malicious software

Virus Scan

Windows files are commonly attacked by malicious software that prevents them from working properly. First step in addressing problems with asyncmac.sys file or any other Windows system files should be scanning the system for malicious software using an antivirus tool.

If by any chance you don't have any antivirus software installed on your system yet, you should do it immediately. Unprotected system is not only a source of file errors, but, more importantly, makes your system vulnerable to many dangers. If you don't know which antivirus tool to choose, consult this Wikipedia article – comparison of antivirus software.

Step 2: Update your system and drivers.

Windows Update

Installing relevant Microsoft Windows patches and updates may solve your problems related to asyncmac.sys file. Use dedicated Windows tool to perform the update.

  1. Go to the Windows "Start" menu
  2. Type "Windows Update" in the search field
  3. Choose the appropriate software program (name may vary depending on your system version)
  4. Check if your system is up to date. If any unapplied updates are listed, install them immediately.
  5. After the update has been done,restart your computer in order to complete the process.

Beside updating the system, it is recommended that you install latest device drivers, as drivers can influence proper working of asyncmac.sys or other system files. In order to do so, go to your computer or device producer's website where you will find information regarding latest driver updates.

Step 3: Use System File Checker (SFC) tool

System File Checker

System File Checker is a Microsoft Windows tool. As the name suggests, the tool is used for identyfing and addressing system file related errors, including those related to asyncmac.sys file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the asyncmac.sys file with properly working version. To use the tool:

  1. Go to the Windows "Start" menu
  2. Type "cmd" in the search field
  3. Locate "Command Prompt" result – don't run it yet:
  4. Click the right mouse button and select "Run as Administrator" option
  5. Type "sfc /scannow" in console prompt to start the program and follow the instructions

Step 4: Restoring Windows system

Windows Recovery

Another approach is to restore system to previous state, before the asyncmac.sys file error occured. In order to restore your system, follow the instructions below

  1. Go to the Windows "Start" menu
  2. Type "System Restore" in the search field
  3. Start the system restore tool – it's name may differ depending on version of the system
  4. The application will guide you through the process – read the messages carefully
  5. After the process has finished, restart your computer.

If all the above-mentioned methods failed and the asyncmac.sys file problem has not been resolved, proceed to the next step. Remember that the following steps are intended only for advanced users.

Download and replace asyncmac.sys file

The last solution is to manually download and replace asyncmac.sys file in appropriate folder on the disk. Select file version compatible with your operating system and click the "Download" button. Next, go to your web browser's "Downloaded" folder and copy the downloaded asyncmac.sys file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of asyncmac.sys file example directory paths.

  • Windows 10: C:\Windows\System32\drivers\
  • Windows 8.1: C:\Windows\System32\drivers\
  • Windows 8: 1: C:\Windows\System32\drivers\
  • Windows 7: C:\Windows\System32\drivers\
  • Windows Vista: C:\Windows\System32\drivers\
  • Windows XP: ---

If the steps did not solve your asyncmac.sys file problem, you should consult a professional. A probability exists that the error(s) might be device-related and therefore should be resolved at the hardware level. A fresh operating system installation might be necessary – a faulty system installation process can result in data loss.

File versions list

Filename asyncmac.sys
System Windows 10
File size 20480 bytes
Date 2017-03-18
File details
MD5 7bd1940c3b09d763450cecbf33b2aad7
SHA1 1c2aabe43623a3d7c1c5674029e46f7b57c28805
SHA256 8ec57160d318565ae0999478e6307dc442420b608f7917595b098d58640d81d6
CRC32 67c21193
Example file location C:\Windows\System32\drivers\
Filename asyncmac.sys
System Windows 8.1
File size 21504 bytes
Date 2013-08-22
File details
MD5 437eac134721f0ba2d856fa3b2622f7b
SHA1 ea340ef24183372fc85eb2f26e6775a9ce2a9196
SHA256 0b07ceb94c9f5fa86996a031e054ad3c7177c6185d946398a9ff9e57cf10d0ae
CRC32 7bd5c4da
Example file location C:\Windows\System32\drivers\
Filename asyncmac.sys
System Windows 8
File size 21504 bytes
Date 2012-07-26
File details
MD5 e12bc771325e70c2a875136b0baf491e
SHA1 6256f0bf6478eddd9639cafe35c65cfabb48959a
SHA256 b01621a5b26551a9aa0d379976abb6cf1672f8f9a7689a651afab4a8e72df343
CRC32 c5fd9afa
Example file location 1: C:\Windows\System32\drivers\
Filename asyncmac.sys
System Windows 7
File size 23040 bytes
Date 2009-07-14
File details
MD5 769765ce2cc62867468cea93969b2242
SHA1 f95c0982b6bf5ba30dd2489e5567c8738a15e82d
SHA256 0d8f19d49869df93a3876b4c2e249d12e83f9ce11dae8917d368e292043d4d26
CRC32 9d7b4b3d
Example file location C:\Windows\System32\drivers\
Filename asyncmac.sys
System Windows Vista
File size 22016 bytes
Date 2008-01-21
File details
MD5 22d13ff3dafec2a80634752b1eaa2de6
SHA1 875b350b6141b50ce86411ccc5f7fca4fb32c474
SHA256 503f7e5f1b14d3f7aeab0982e812b19dabe38fd4104d93922f50f0b2d19becfb
CRC32 f3a174d5
Example file location C:\Windows\System32\drivers\
Filename asyncmac.sys
System Windows XP
File size 14336 bytes
Date 2008-04-14
File details
MD5 b153affac761e7f5fcfa822b9c4e97bc
SHA1 d3ae90917c931145319570b926d360b29cf6a569
SHA256 7e60f572a6b3c6219e3c86225aa37243affd74337db7f108b04778042e5cc959
CRC32 8540113d
Example file location ---