AvastUI.exe – What is it, Uses, Fix Common Error

  • Ankita 
  • OS

AvastUI.exe is an executable file and is one of the drivers for Avast Free Antivirus software. It is developed by Avast, a cybersecurity company, and is available for Microsoft Windows, Mac, and Android Operating Systems.

The full form of AvastUI is Avast Antivirus User Interface.

Brief Details:

Filename: avastui.exe
Publisher: AVAST Software
File Location: C:\Program Files\AVAST Software\Avast\

The Avast Free Antivirus is among the top 5 Antivirus that provide robust security to home pc. It comes with inbuilt anti-spyware, anti-malware, and much more features.

What is it & its uses?

Avast Free Antivirus is an anti-malware software that scans and removes suspicious or malicious programs from the system. It helps in eliminating Trojan, Worms, Virus, trackers amongst other malicious programs.

Its uses are:

  • Automatic threat updates using PUSH
  • Anti-malware
  • Anti-spyware
  • Protection from phishing fraudulence
  • Providing a secure Virtual Private Network for Internet browsing
  • Spam filter
  • Providing scanning and threat removal tools for System security
  • Alerts for password leaks 

File size & location

The default location of AvastUI.exe is in C:\Program Files\AVAST Software\Avast\ for 32-bit program or OS. It will be located in C:\Program Files (x86) \AVAST Software\Avast\ folder for 64 bit version. 

On an average the file size os about 5.2 MB.

You may be interested to know about Avastsvc.exe which is also a part of Avast Antivirus.

Is it safe or virus

Avastui.exe is a trustworthy application. But if a malware disguises itself with a similar name, then the system could get corrupted.

There are three ways to check if that suspicious file is a malware:

  • If file Properties and location path of avastui.exe are not as per the original location, then the process is a virus.
  • If Microsoft Process Explorer is “Unable to Verify” the “Verified Signer” status of the process.
  • If the VeriSign certificate of the process is not issued to AVAST Software s.r.o, then it is malware. 

Error Errors

Some common errors encountered with AvastUI.exe are:

  • Faulting Application Path: avastui.exe
  • exe is not a valid Win32 application.

These errors can be caused due to:

  • Interruption in Installation
  • Conflicts with other Softwares
  • Corrupt entry in Registry
  • Missing/ broken AvastUI.exe file

If you are receiving application or system error related to AvastUI.exe then it is recommended to reinstall the Avast Antivirus to get rid of this error message.

uninstall How to remove AvastUI.exe?

AvastUI.exe is not a core Windows process. So, removing or disabling it will not hamper other system programs.

There are two ways to remove it:

  • Go to the Control Panel and browse for “Avast! Free Antivirus“. Double click on uninstall it.
  • You may also use third party Uninstaller software.


Founder and Writer @ WinOSBite. Future plan is to make this platform open to community to resolve and discuss various issues, usage related to Operating System.

Leave a Reply

Your email address will not be published. Required fields are marked *