How to Download and Fix dc21x4vm.sys?

Sometimes Windows system displays error messages regarding corrupted or missing dc21x4vm.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 dc21x4vm.sys file can therefore effect in failed execution of the started process.

dc21x4vm.sys file Microsoft Virtual Miniport 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 dc21x4vm.sys related errors on your device. You can also download dc21x4vm.sys file compatible with Windows 10, Windows 8.1, Windows 7, Windows 8, Windows Vista devices which will (most probably) allow you to solve the problem.

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

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Fix dc21x4vm.sys errors

1 Information about dc21x4vm.sys file
2 Errors related to dc21x4vm.sys file
3 How to fix dc21x4vm.sys related errors?

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

4 Download dc21x4vm.sys

4.1 List of dc21x4vm.sys file versions

File info

General information
Filename	dc21x4vm.sys
File extension	SYS
Description	Microsoft Virtual Miniport 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 dc21x4vm.sys file related problems

There are various types of errors related to dc21x4vm.sys file. dc21x4vm.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 dc21x4vm.sys file. If you encounter one listed below (or similar), please consider the following suggestions.

dc21x4vm.sys is corrupted
dc21x4vm.sys cannot be located
Runtime Error - dc21x4vm.sys
dc21x4vm.sys file error
dc21x4vm.sys file cannot be loaded. Module was not found
cannot register dc21x4vm.sys file:
dc21x4vm.sys file could not be loaded
dc21x4vm.sys file doesn't exist

dc21x4vm.sys

Application could not be started because dc21x4vm.sys file is missing. Reinstall the application to solve the problem.

Problems related to dc21x4vm.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 dc21x4vm.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 dc21x4vm.sys errors in just few steps?

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

dc21x4vm.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 dc21x4vm.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 dc21x4vm.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 dc21x4vm.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 dc21x4vm.sys file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the dc21x4vm.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 dc21x4vm.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 dc21x4vm.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 dc21x4vm.sys file

The last solution is to manually download and replace dc21x4vm.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 dc21x4vm.sys file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of dc21x4vm.sys file example directory paths.

Windows 10: C:\Windows\System32\DriverStore\FileRepository\dc21x4vm.inf_x86_0e1cf7c50ca4ffaa\
Windows 8.1: C:\Windows\System32\DriverStore\FileRepository\dc21x4vm.inf_x86_a0b21378e23f5730\
Windows 7: ---
Windows 8: ---
Windows Vista: ---

If the steps did not solve your dc21x4vm.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 dc21x4vm.sys

System Windows 10

File size 81408 bytes

Date 2017-03-18

Download

File details
	MD5	4c85b98412e0f991f83c43e9017287d5
	SHA1	48e559e22d67f9b4f3ee6955eeb44eb6a5e22209
	SHA256	d02b04310a6dad948489351da97a53e1d555c4741cbae8e2a520e319f01b30c9
	CRC32	f90948d8
	Example file location	C:\Windows\System32\DriverStore\FileRepository\dc21x4vm.inf_x86_0e1cf7c50ca4ffaa\

Filename dc21x4vm.sys

System Windows 8.1

File size 52224 bytes

Date 2012-06-02

Download

File details
	MD5	a522912edb7900e09fa8f65abc3e8c90
	SHA1	6fb0e00bb95475e3fba5e310c89621f320d5e26a
	SHA256	d4aa04eee70789aef56af892d431355e0b8749c8e1831d5575f6f73609cb340f
	CRC32	752e34d0
	Example file location	C:\Windows\System32\DriverStore\FileRepository\dc21x4vm.inf_x86_a0b21378e23f5730\

Filename dc21x4vm.sys

System Windows 7

File size 57344 bytes

Date 2009-06-10

Download

File details
	MD5	ad227ce1e1a558853ffa1f7eb40e21e0
	SHA1	40303faedfc5c0f19e4bf21f44d7ff7165fe592b
	SHA256	062816816828b2aac54fc8fd176f5929012566765f8736d2d6ce1831b9ba2292
	CRC32	609d95a3
	Example file location	---

Filename dc21x4vm.sys

System Windows 8

File size 52224 bytes

Date 2012-06-02

Download

File details
	MD5	a522912edb7900e09fa8f65abc3e8c90
	SHA1	6fb0e00bb95475e3fba5e310c89621f320d5e26a
	SHA256	d4aa04eee70789aef56af892d431355e0b8749c8e1831d5575f6f73609cb340f
	CRC32	752e34d0
	Example file location	---

Filename dc21x4vm.sys

System Windows Vista

File size 57344 bytes

Date 2009-06-10

Download

File details
	MD5	ad227ce1e1a558853ffa1f7eb40e21e0
	SHA1	40303faedfc5c0f19e4bf21f44d7ff7165fe592b
	SHA256	062816816828b2aac54fc8fd176f5929012566765f8736d2d6ce1831b9ba2292
	CRC32	609d95a3
	Example file location	---