What is ashMaiSv.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 ashMaiSv.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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AshMaiSv.exe file information

Windows Task Manager with ashMaiSv
AshMaiSv.exe process in Windows Task Manager

The process known as avast! e-Mail Scanner Service belongs to software avast! Antivirus by ALWIL Software (

Description: AshMaiSv.exe is not essential for the Windows OS and causes relatively few problems. AshMaiSv.exe is located in a subfolder of "C:\Program Files"—usually C:\Program Files\Alwil Software\Avast4\. Known file sizes on Windows 10/8/7/XP are 254,040 bytes (43% of all occurrences), 247,160 bytes, 250,040 bytes or 255,616 bytes. 
The ashMaiSv.exe file is not a Windows core file. The application can be uninstalled in the Control Panel. The program is not visible. The software uses ports to connect to or from a LAN or the Internet. The file is a Verisign signed file. The file has a digital signature. Therefore the technical security rating is 23% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you encounter difficulties with ashMaiSv.exe, you can do the following:
  1) remove the entire program avast! Antivirus using Windows Control Panel
  2) look for help on the website.

Recommended: Identify ashMaiSv.exe related errors

External information from Paul Collins:

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

avast antivirus email scanner, works well!
virus scanner
free antivirus software
avast antivirus protection
Avast Email Scanner
    (further information)
Avast! AntiVirus background provider for email scan
    (further information)
Is part of the mechanism that scans e-mail / updates for the service. This process should not be removed to ensure that your system security is not breached.
avast antivirus
Integrated part of Avast Antivirus
Avast Email Scanner
appear when you install anti-virus avast
Avast! Anti-Virus E-Mail Scanner. Work Fine!
I have been using it for some time and it seems to work well for me
  Kathleen Nielsen  
Avast virus scanner, Very effective, and Free.
I found the avast file its and o.k. but I've found another file lurking in C:\WINDOWS\Prefetch this one however uses up most of my cpu and is sending plenty of packets, be warned there are malicious files under this name.
It connects to sites without any reason - firewall displays the following IP's,,, and many more. Has been burning up bandwidth. May be hijacked.
  Marcus Smith  
Avast antivirus email scanner
  crax   (further information)
Avast! Viren-Scanner
Very active in thecpu
It's fine. Deleting it may cripple your copy of Avast, so don't so it. Better to check another process if you're just looking for one to kill...

Rating chart

Summary: Average user rating of ashMaiSv.exe: based on 35 votes with 21 user comments. 30 users think ashMaiSv.exe is essential for Windows or an installed application. 2 users think it's probably harmless. 3 users think ashMaiSv.exe is dangerous and recommend removing it. One user is not sure about it.

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Best practices for resolving ashMaiSv issues

A clean and tidy computer is the key requirement for avoiding problems with ashMaiSv. 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 repairing of your installation or, for Windows 8 and later versions, 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 ashMaiSv.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

ashMaiSv.exe [all]