What is MSASCui.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 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.

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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 User Interface or Windows Defender belongs to software Windows Defender or Microsoft Windows or Microsoft Windows Operating System or Legacy utilities for WebPlus (version 10) or Verizon Media Manager by Microsoft (

Description: MSASCui.exe is not essential for the Windows OS and causes relatively few problems. The MSASCui.exe file is located in a subfolder of "C:\Program Files" or sometimes in a subfolder of C:\. Known file sizes on Windows 8/7/XP are 866,584 bytes (37% of all occurrences), 777,424 bytes and 15 more variants. 
There is an icon for this program on the taskbar next to the clock. The program has a visible window. It is digitally signed. MSASCui.exe is not a Windows system file. You can uninstall this program in the Control Panel. Therefore the technical security rating is 3% dangerous, however you should also read the user reviews.
If you have any problems with MSASCui.exe, you may also uninstall the associated program (Start > Control Panel > Add/Remove programs > 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

Important: Some malware camouflages itself as MSASCui.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example Trojan.Win32.Inject.boae or Packed.Win32.Katusha.j (detected by Kaspersky), and Trojan.Gen or Packed.Mystic!gen4 (detected by Symantec). 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 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??
MS Win Defender
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of MSASCui.exe: based on 62 votes with 9 reviews. 47 users think MSASCui.exe is essential for Windows or an installed application. 5 users think it's neither essential nor dangerous. 2 users suspect danger. 8 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 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 doing a repair of your installation, or in the case of Windows 8, 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 MSASCui.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

MSASCui.exe [all]