You may have seen conhost.exe appear in Windows Task Manager and wonder what it is. Those running graphics-intensive applications or with NVIDIA graphics may have also noticed multiple instances of conhost. In this article, we will shed more light on what this process really is, why do you see multiple instances and what does it have to do with Windows.
What is Conhost.exe
First, conhost completely means Console Window Host. Let's do some history. In Windows XP, the command prompt was handled by a similar process called the client-server runtime system service (CSRSS). At that moment, CSRSS could crash and bring down the whole system with it, and it also did not allow developers to execute thematic code in the processes of a system.
In Windows Vista, Desktop Window Manager was introduced (DWM). This service drew composite views on the desktop rather than letting each application take care of its own. This gave the command prompt a similar theme degree to other windows. The DWM service only handled title bars and frame, leaving other components, hence the old scroll bars.
From Windows 7, we saw the Host from the console window (conhost.exe). As the name already suggests, is a host process for the console window. Conhost.exe serves as the interface between CSRSS and the Windows command prompt, allowing Windows to fix previous problems, as the theme of the entire cmd command prompt window, and allows drag and drop on command prompt command. Conhost.exe has lived up to Windows 10, leaving room for all new interface elements and styles that have been introduced in Windows.
Although the Task Manager shows different instances of the Host from the console window, is still associated with CSRSS. Verifying the conhost.exe process with Process Explorer verifies that conhost.exe is running under the csrss.exe process.
Therefore, the console window Host is more of a shell that takes care of the operation of a system service like CSRSS, while still allowing the ability to make use of modern UI elements. .
Why are there multiple instances of Conhost.Exe?
As I said at the beginning of the article, you will often see multiple instances of the Host process from the console window running in Task Manager. This is because each running command line instance has its own Console Window Host process. Whether it is a third-party application or an active window or not, you will see an instance of the Host from the console window in Task Manager. An example is an application that runs a silent update in the background using the command line.
It is common to see multiple instances of conhost.exe running in Task Manager. These instances require very little CPU or RAM resources. However, if you have noticed continued excessive use of CPU or RAM, you need to dig deeper and determine what specific applications are involved. You can download Process Explorer from Microsoft and run it to learn more about what the problem might be. This article gives you more details on how Process Explorer works.
If you are wondering if conhost.exe is malware, it is just an essential component of Windows. But it is possible that a virus could replace the actual console window Host with its own process, which can be easily detected by right-clicking a Host instance from the console window and clicking Open file location.
If the file is on Windows System32, you can be sure it is not a virus. If the file location is elsewhere, let's say% user profile %% AppDataRoamingMicrosoft, it may be a virus. There are certain malicious programs that disguise themselves as conhost.exe and perform various functions. A better alternative is to install an antivirus like Malwarebytes and run a full malware scan on your PC..
