What is MSASCui.exe?

The genuine MSASCui.exe file is a software component of Microsoft Windows by Microsoft.
Windows is an operating system by Microsoft. Windows Defender is an anti-malware component of Windows. MSASCui.exe is a command prompt for Windows Defender, and does not cause any issues with your PC.

Windows is range of operating system families developed, sold and supported by Microsoft. Included with Windows Vista and later and Windows Server 2016, Windows Defender was first released as a free antispyware program for Windows XP, but is today a comprehensive antivirus program that replaces Microsoft Security Essentials in Windows 8 and later. It offers several advanced features such as real time protection, browser integration and the ability to periodically scan a system if another antivirus program is installed.

Abbreviated as MS, Microsoft gets its name from the words microcomputer and software, and is a reputable American technology company that develops, sells and supports computer software, personal computers and consumer electronics. The Microsoft Corporation has made several big ticket acquisitions over the years including aQuantive, Fast Search & Transfer, Visio Corporation and Yammer.

MsASCUI stands for Microsoft Anti Spyware Command Line User Interface

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 MSASCui.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 MSASCui.exe related errors

MSASCui.exe file information

Windows Task Manager with MSASCui
MSASCui.exe process in Windows Task Manager

The process known as Windows Defender User Interface or Internet Explorer belongs to software Windows Defender or Microsoft Windows Operating System or Microsoft Windows or Windows Internet Explorer by Microsoft (

Description: The original MSASCui.exe from Microsoft is an important part of Windows, but often causes problems. The MSASCui.exe file is located in a subfolder of "C:\Program Files (x86)" (mostly C:\Program Files (x86)\Windows Defender\). Known file sizes on Windows 10/8/7/XP are 1,008,184 bytes (22% of all occurrences), 866,584 bytes and 25 more variants. 
MSASCui.exe is certified by a trustworthy company. It is a trustworthy file from Microsoft. MSASCui.exe is able to monitor applications. Therefore the technical security rating is 10% dangerous, but you should also take into account the user reviews.

Uninstalling this variant: If you have any problems with MSASCui.exe, you may also uninstall the associated program (Start > Control Panel > Uninstall a Program > Windows Defender), turn to the software developer, Microsoft, for advice or search for an update on the vendor’s website.

Recommended: Identify MSASCui.exe related errors

Viruses with the same file name

Is MSASCui.exe a virus? No, it is not. The true MSASCui.exe file is a safe Microsoft Windows system process, called "Windows Defender User Interface". However, writers of malware programs, such as viruses, worms, and Trojans deliberately give their processes the same file name to escape detection. Viruses with the same file name are e.g. TrojanSpy:MSIL/VB.M or Worm:Win32/Vercuser.A (detected by Microsoft), and Gen:Variant.Razy.109525 (detected by F-Secure).
To ensure that no rogue MSASCui.exe is running on your PC, click here to run a Free Malware Scan.

How to recognize suspicious variants?

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

Windows Defender
Windows Defender User Interface
Assuming that you have the original distributed product, it is an important part of the Windows malware defense. It should be left in place even if you have another third party antivirus product installed.
  ota   (further information)
It is an part of Windows Defender Antispyware But malware can be named anything
It notice was always popping up on my computer. I deleted the scheduled tasks in task manager and it stopped.
I tried to remove Windows Defender, thought I accomplished it number times. I have a Dell at home. (PC) and a HD Mac at work.... Windows defender and all their BS with weird files we don't understand... Everyone has start up problems.. You have to have a virus protection program like norton or better. But Macs are the way to go if you wanna stay virus free. Windows has to be in on it with the anti virus companies + all the hackers if they don't send out "their own"
uses a lot of cpu
been using windows defender for months & this process shows up just today??
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of MSASCui.exe: based on 65 votes with 9 reviews. 48 users think MSASCui.exe is essential for Windows or an installed application. One user thinks it's probably harmless. 5 users think it's neither essential nor dangerous. 2 users suspect danger. 9 users think MSASCui.exe is dangerous and recommend removing it. 9 users don't grade MSASCui.exe ("not sure about it").

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Best practices for resolving MSASCui issues

A clean and tidy computer is the key requirement for avoiding problems with MSASCui. 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 MSASCui.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

MSASCui.exe [all]