What is AvastUI.exe?

The genuine AvastUI.exe file is a software component of Avast Free Antivirus by AVAST.
Avast Free Antivirus is a freeware security program that protects computers against malware, viruses, trojans and computer worms. AvastUI.exe launches the user interface for the Avast Free Antivirus. This is not an essential Windows process and can be disabled if known to create problems. Avast Free Antivirus is a freeware security solution available only for non-commercial or home use. The program offers an antivirus program with antispyware, antiphishing, anti-malware, automatic updates, HTTPS scanning, a Home Network Security scanner, DeepScreen, and much more. The program is available for the Microsoft Windows, Mac OS and Android platforms. AVAST Software is a Czech company that develops Internet security software products. The company was originally founded as ALWIL Software by Pavel Baudiš and Eduard Kučera in 1988 after they had tackled the Vienna virus. Avast Antivirus is currently one of the most popular and top-rated security applications available on the market. AVAST Software is based in Prague, Czech Republic.

AvastUI stands for Avast Antivirus 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 AvastUI.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 AvastUI.exe related errors

AvastUI.exe file information

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

The process known as avast! Antivirus

belongs to software Avast Free Antivirus or Avast Internet Security or Avast Pro Antivirus or Avast Antivirus or Avast! Antivirus or avast! Premier or AVAST Software a.s or AVAST Software s.r.o

by AVAST Software ( or Avast Software s.r.o or ALWIL Software (

Description: AvastUI.exe is not essential for the Windows OS and causes relatively few problems. AvastUI.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 5,227,112 bytes (10% of all occurrences), 5,515,496 bytes and 75 more variants. 
The AvastUI.exe file is certified by a trustworthy company. The AvastUI.exe file is not a Windows system file. The process is loaded during the Windows boot process (see Registry key: MACHINE\Run, Run). It can change the behavior of other programs or manipulate other programs. The program is not visible. AvastUI.exe is able to monitor applications and record keyboard and mouse inputs. Therefore the technical security rating is 44% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you encounter difficulties with AvastUI.exe, you may also ask the software vendor,, for advice or safely remove the program using the uninstall program of Avast Free Antivirus or avast! Free Antivirus (Control Panel ⇒ Uninstall a Program).

Recommended: Identify AvastUI.exe related errors

Important: Some malware camouflages itself as AvastUI.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example TROJ_GEN.R03EC0VEI16 (detected by TrendMicro), and HEUR:Trojan.Script.Generic (detected by Kaspersky). Therefore, you should check the AvastUI.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

Known AntiVirus Program
  Max   (further information)
avast! Antivirus
  avast user  
Avast User Interface!
avast antivirus
  avast user   (further information)
It slows down my computer; it is good for detecting and removing all kinds of viruses, etc. Just that it should not stay to continuously monitor things because it slows down the computer a lot.
Avast is the only antivirus I truly trust...
  Anonymous   (further information)
Very good antivirus....
Good antivirus program, blocks dangerous urls, disables malicious programs, and has plenty of extra goodies like a sandbox and individual file scanner
It's an Antivirus Programe.
  Mehul Garg  
Very useful antivirus program.
I have always been happy with Avast, their pre-boot scan has solved all but one problem I've had.
  Ray F. Potter   (further information)
i have installed avast for quite some time.. but i experience having my USB infected with virus twice.. when i decided to uninstall avast it leaves sttuborn files like AvastUI that wont be removed coz of the permissions.. i dont recomend it for my own experience.. sorry..
For secure my computer unit. Anti virus
avast premier internet security and anti-virus
  MR. T  

Rating chart

Summary: Average user rating of AvastUI.exe: based on 34 votes with 17 user comments. 25 users think AvastUI.exe is essential for Windows or an installed application. 5 users think it's probably harmless. 2 users think it's neither essential nor dangerous. 2 users think AvastUI.exe is dangerous and recommend removing it.

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Best practices for resolving AvastUI issues

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

AvastUI.exe [all]