What is msert.exe?

The genuine msert.exe file is a software component of Microsoft Safety Scanner by Microsoft Corporation.
"Msert.exe", the Microsoft Safety Scanner, (formerly "Emergency Response Tool"), is a self-contained executable file that scans a computer for malware and reports its findings. It can be downloaded onto a computer using Windows 10, Windows 10 Tech Preview, Windows 8.1, Windows 8, Windows 7, Windows Server 2016, Windows Server Tech Preview, Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 R2, or Windows Server 2008. After ten days it must be downloaded again for re-use. It executes from the location chosen when downloading, (by default, "C:\Users\\Downloads"), and is easily removed by deleting the file. It offers a choice of scans to perform and displays all malware it finds on the screen upon completion. It only scans and is not a substitute for installing Windows Defender (Win10/8.1/8) or Microsoft Security Essentials (Win7) or other anti-malware products. In 2016, Microsoft was the world's largest software company, measured by revenue.

MsERT stands for Microsoft Emergency Response Tool

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 msert.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.

Click to Run a Free Scan for msert.exe related errors

Msert.exe file information

Windows Task Manager with msert
Msert.exe process in Windows Task Manager

The process known as Microsoft Support Emergency Response Tool belongs to software Microsoft Anti-Malware Signature Package or Microsoft Malware Protection by Microsoft (

Description: Msert.exe is not essential for Windows and will often cause problems. The msert.exe file is located in a subfolder of the user's profile folder or sometimes in a subfolder of "C:\Program Files" or in C:\ (common is C:\Users\USERNAME\Downloads\). The file size on Windows 10/8/7/XP is 13,179,660 bytes. 
The file has a digital signature. The msert.exe file is not a Windows core file. The program has no visible window. Msert.exe is able to monitor applications, manipulate other programs and record keyboard and mouse inputs. Therefore the technical security rating is 22% dangerous; but you should also compare this rating with the user reviews.

Uninstalling this variant: You can uninstall Microsoft Anti-Malware Signature Package, or ask Support team for help. Go to Microsoft Anti-Malware Signature Package in the Windows Control Panel (Software or Programs section) to uninstall it, or go to for Customer Support.

Recommended: Identify msert.exe related errors

Important: Some malware camouflages itself as msert.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the msert.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.


User Comments

I've just had a message from Windows Defender that Trojan:Win32/Gatrid.E!plock came from \Downloads\msert.exe, and downloaded today. (Not by me!) So I assume that Windows has downloaded this file (as part of Update?)and Defender has then deleted it. Sounds very Microsoft!

Summary: Average user rating of msert.exe: based on 3 votes with 1 user comment. One user thinks msert.exe is essential for Windows or an installed application. 2 users think it's neither essential nor dangerous. One user is not sure about it.

Do you have additional information? Help other users!

Best practices for resolving msert issues

A clean and tidy computer is the key requirement for avoiding problems with msert. 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, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the msert.exe 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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

msert.exe [all]