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What is monitor?

monitor.sys is a system file associated with the Microsoft Monitor Class Function Driver Service. It is a crucial component of the Windows operating system developed by Microsoft. This file is typically located in the system32 folder of your Windows installation and is necessary for the proper functioning of your computer's display monitor.

The Microsoft Monitor Class Function Driver Service is responsible for managing and controlling the operation of the display monitor. It communicates with the hardware of your monitor, sending commands and receiving data. This service is essential for the correct display of graphics on your screen, including resolution settings, color quality, and refresh rate.

monitor.sys is needed because it is a part of the driver that allows your operating system to interact with your monitor hardware. Without it, your system may not be able to correctly display images or may not be able to communicate with the monitor at all. This could result in a blank screen, incorrect display settings, or other display-related issues.

Under normal circumstances, you should not remove monitor.sys as it is a critical system file. In some cases, this file may become corrupted or infected with malware, causing system instability or security issues. In such cases, you may need to remove or replace the file. Always ensure to replace it with a clean, correct version of the file to maintain system stability and functionality. It is highly recommended to perform such actions under the guidance of a professional or with sufficient technical knowledge.

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

Monitor.sys file information

The process known as Monitor Driver belongs to software Microsoft Monitor Class Function Driver Service by (www.microsoft.com).

Description: Monitor.sys is not essential for the Windows OS and causes relatively few problems. Monitor.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/11/7 are 23,552 bytes (50% of all occurrences) or 37,376 bytes. file.net/process/monitor.sys.html 
The driver can be started or stopped from Services in the Control Panel or by other programs. The file is a Microsoft signed file. The program is not visible. There is no detailed description of this service. monitor.sys appears to be a compressed file. Therefore the technical security rating is 6% dangerous; but you should also compare this rating with the user reviews.

Recommended: Identify monitor.sys related errors

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

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User Comments

Located in C://WINDOWS/system32/DRIVERS/monitor.sys
   
I can see that there are diffs between win 10 and win 11. One of my monitors ( Hitachi tv) is ok with win 10, but with win 11 the picture is larger the the screen, I cant adjust because the screen size is fixed in win 11. Any help out there?
  Klaus Frank  

Summary: Average user rating of monitor.sys: based on 1 vote with 2 user comments. One user thinks monitor.sys is essential for Windows or an installed application. One user is not sure about it.


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Best practices for resolving monitor issues

A clean and tidy computer is the key requirement for avoiding problems with monitor. 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 executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To get your computer running as fast as it did on day one, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.

To help you analyze the monitor.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. A good Bantivirus software detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.



Other processes

monitor.sys [all]