What is aswRunDll.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 aswRunDll.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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AswRunDll.exe file information

Windows Task Manager with aswRunDll
AswRunDll.exe process in Windows Task Manager

The process known as Avast Antivirus Installer or aswRunDl Application belongs to software avast! Free Antivirus or Avast Antivirus by AVAST Software (

Description: AswRunDll.exe is not essential for Windows and will often cause problems. The aswRunDll.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 107,056 bytes (50% of all occurrences), 107,568 bytes, 901,992 bytes or 159,048 bytes. 
It is a file with no information about its developer. The program has no visible window. The aswRunDll.exe file is not a Windows system file. AswRunDll.exe is able to manipulate other programs. Therefore the technical security rating is 46% dangerous, however you should also read the user reviews.

Uninstalling this variant: You can do the following:
  • search for help on the company's website
  • uninstall avast! Free Antivirus or Avast Premier from your computer using the Control Panel applet Uninstall a Program

Recommended: Identify aswRunDll.exe related errors

Important: Some malware camouflages itself as aswRunDll.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the aswRunDll.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 know that on my PC Malwarebytes and even Avast both detected this as a high threat called Win32 Malware-gen.Avast could not repair it.
  Bill Thomas  
It runs as you are uninstalling it. It is not dangerous at all.
Installed in Avast Internet Security 2012 folder
  Basil Bean  
I think, this is an avast file
  Dömötör Tamás  
у меня этот файл глючит
  Аваст   (further information)
This exe file when crashes or goes missing, then it doesnot allow avast to be uninstalled, not even in the windows safe mode
  Akshay Gudi  

Summary: Average user rating of aswRunDll.exe: based on 2 votes with 6 user comments. One user thinks it's probably harmless. One user thinks it's neither essential nor dangerous. 4 users don't grade aswRunDll.exe ("not sure about it").

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Best practices for resolving aswRunDll issues

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

aswRunDll.exe [all]