What is sdiagnhost.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the sdiagnhost.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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Sdiagnhost.exe file information

The process known as Systemeigener Host für Skriptdiagnose or Scripted Diagnostics Native Host belongs to software Betriebssystem Microsoft Windows or Microsoft Windows Operating System by Microsoft (

Description: The original sdiagnhost.exe is an important part of Windows and rarely causes problems. The sdiagnhost.exe file is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 21,504 bytes (66% of all occurrences) or 22,016 bytes. 
The sdiagnhost.exe file is a Windows core system file. The program is not visible. The sdiagnhost.exe file is a trustworthy file from Microsoft. Therefore the technical security rating is 1% dangerous.

Recommended: Identify sdiagnhost.exe related errors

Important: Some malware disguises itself as sdiagnhost.exe, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the sdiagnhost.exe 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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Best practices for resolving sdiagnhost issues

A clean and tidy computer is the key requirement for avoiding problems with sdiagnhost. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic 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 resmon 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, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the sdiagnhost.exe process on your computer, the following programs have proven to be helpful: Security 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. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

sdiagnhost.exe [all]