Fix rasacd.sys Errors

Sometimes Windows system displays error messages regarding corrupted or missing rasacd.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 rasacd.sys file can therefore effect in failed execution of the started process.

rasacd.sys file RAS Automatic Connection 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 rasacd.sys related errors on your device. You can also download rasacd.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.

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

User popularity

3.1 Scanning for malicious software
3.2 System and driver update
3.3 System File Checker tool
3.4 System recovery

4 Download rasacd.sys

4.1 List of rasacd.sys file versions

File info

General information
Filename	rasacd.sys
File extension	SYS
Description	RAS Automatic Connection 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.)

Most common rasacd.sys file related problems

There are various types of errors related to rasacd.sys file. rasacd.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 rasacd.sys file. If you encounter one listed below (or similar), please consider the following suggestions.

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

rasacd.sys

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

Problems related to rasacd.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 rasacd.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.

How to fix rasacd.sys errors in just few steps?

Remember, before taking any action related to system files perform a backup copy of your data!

rasacd.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

Windows files are commonly attacked by malicious software that prevents them from working properly. First step in addressing problems with rasacd.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.

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

Go to the Windows "Start" menu
Type "Windows Update" in the search field
Choose the appropriate software program (name may vary depending on your system version)
Check if your system is up to date. If any unapplied updates are listed, install them immediately.
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 rasacd.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 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 rasacd.sys file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the rasacd.sys file with properly working version. To use the tool:

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

Step 4: Restoring Windows system

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

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

If all the above-mentioned methods failed and the rasacd.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 rasacd.sys file

The last solution is to manually download and replace rasacd.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 rasacd.sys file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of rasacd.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 rasacd.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 rasacd.sys

System Windows 10

File size 12288 bytes

Date 2017-03-18

Download

File details
	MD5	ab12d3534948b5de6e24f4ec9f0fb0d0
	SHA1	cd7784a2c1db94c6d842092ab61926c5e77d5f97
	SHA256	666dd4b1fa34c1ef58d0dc5c69e58198ec2a9dd9daf086e6114f656d107b358a
	CRC32	013b91dd
	Example file location	C:\Windows\System32\drivers\

Filename rasacd.sys

System Windows 8.1

File size 11776 bytes

Date 2014-11-21

Download

File details
	MD5	d94d03ba0a61aaf5a5e008bf33bd2519
	SHA1	5468832c92ca504ff508eeeb16289001ea50c4c3
	SHA256	7044d8fd01d20e2611694f6cbf8f570c1eec141ee186bb690e580560347cee06
	CRC32	338a1fc1
	Example file location	C:\Windows\System32\drivers\

Filename rasacd.sys

System Windows 8

File size 11776 bytes

Date 2012-07-26

Download

File details
	MD5	c07e9331431c78d41f30e62a15e1d324
	SHA1	a6d07134bc49988feedba7fa69bd949ba71fd481
	SHA256	aeb4acd4352149cc5ee88ccb73386559fdc03735e1f641271ce7d137ef923ed1
	CRC32	90b8568a
	Example file location	1: C:\Windows\System32\drivers\

Filename rasacd.sys

System Windows 7

File size 14848 bytes

Date 2009-07-14

Download

File details
	MD5	5a0da8ad5762fa2d91678a8a01311704
	SHA1	09c5fda4f1c7f86907ff8f63b8687527530f77f4
	SHA256	8a64eb5dbab7048a9e42a21ceb62ccd5b007a80c199892d7f8c69b48e8a255ef
	CRC32	cd96f914
	Example file location	C:\Windows\System32\drivers\

Filename rasacd.sys

System Windows Vista

File size 14848 bytes

Date 2008-01-21

Download

File details
	MD5	1013b3b663a56d3ddd784f581c1bd005
	SHA1	13642c7e767bfe7e1dbd9b93ddcc02bf29c8ea87
	SHA256	36b83f234c2d6a6112bc8b5ef0ab5075ee98ac0bed702c37e4c1c3d17eb49956
	CRC32	02b7c772
	Example file location	C:\Windows\System32\drivers\

Filename rasacd.sys

System Windows XP

File size 8832 bytes

Date 2008-04-14

Download

File details
	MD5	fe0d99d6f31e4fad8159f690d68ded9c
	SHA1	ab474db29198ea46f5e1c1d60b7aa215660cd563
	SHA256	998685622abe631984b7e4dbf91ab3594b1f574378d75eb9f6265f4650470692
	CRC32	399cdf00
	Example file location	---