What is A~NSISu_.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 A~NSISu_.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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A~NSISu_.exe file information

The process known as A~NSISu_.exe belongs to software OptimizerPro by unknown.

Description: A~NSISu_.exe is not essential for Windows and will often cause problems. A~NSISu_.exe is located in the Windows folder for temporary files. Known file sizes on Windows 10/8/7/XP are 99,767 bytes (50% of all occurrences) or 64,786 bytes. 
The program has a visible window. There is no description of the program. The A~NSISu_.exe file is not a Windows core file. Therefore the technical security rating is 28% dangerous, however you should also read the user reviews.

Uninstalling this variant: You could safely remove the program using the uninstall program of OptimizerPro (Control Panel ⇒ Uninstall a Program).

Recommended: Identify A~NSISu_.exe related errors

If A~NSISu_.exe is located in a subfolder of the user's profile folder, the security rating is 42% dangerous. The file size is 129,767 bytes (50% of all occurrences) or 48,336 bytes. It is not a Windows system file. There is no information about the author of the file.

Important: Some malware camouflages itself as A~NSISu_.exe. Therefore, you should check the A~NSISu_.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

Becarefull With Spyware Removers, SpywareSnooper_set has a~nsisu_.exe within IT! It is SpyWare!! Get winpatrol to monitor all reg changes and Much More,freeware
  Bill MacG   (further information)
I installed stylexp program but tried to uninstall appear me this -A~NSISu_.exe - No se encuentra el punto de entrada del procedimiento CM_Get_Device_IDA en la
My copy has no information under the Properties Tab; that suggests to me that it was not created by a legitimate developer
  Jimmy Fajkus  
I had some spyware and think I got rid of it but Kereo firewall says this file is trying to launch something
A~NSISu_.exe in temp folder, refered,in file wininit.ini , from html editor installer, sent ping to firewall, starts at boot and shuts off computer, delete in safe mode at c: prompt.
  empty temp   (further information)
maybe installed by trymedia or activemark. i was looking for changes made when installing trial programs, found registry entries to this file and some "system.dll" files
it is spyware it sets it self in zone alarm as safe to have accses but it is spyware remove it by the way get and aware because it is reputable never get something off a popup
May be part of/or trojan which reduces firewall settings and steals keystrokes for bank info.
  Jean West  
When updating to Adobe Reader 8.0, a popup box appeared, asking permission to allow this file to have its way.
On my computer it seems to have the icon associated for Spam Buddy 3.0 or something like it. I did try a 30-day trial of spam buddy so that might be it in my case. Spam buddy is a program used to monitor e-mails and reduce spam. I removed spam buddy a day or so ago and this is still around. I am deleting it manually. It had firewall privliges to go inbound and outbound.
  John Murray  
It comes with Morephus. It attempted to connect to their web site when I tried uninstalling it, and my firewall caught it. I don't know if its dangerous, but its definitely associated with Morephus.
Used as part of Juno Dial-Up SW install/uninstall and probably other SW packages as well.
Was installed by Spyshredder. Ads then tried to install 88 viruses caught by McAfee. REMOVE IT.
A~NSISu_.exe replaced my Vista network name to uneditable 'Unidentified Network', acquired a Morpheus icon, acquired System rights & not allow direct deletion, and if you can change its 'fast duplication' properties to off it will attempt to duplicate many times in the same directory but finally succumbed to deletion. It was located in c:\Users\username\AppData\Local\Temp. If you delete everything here, it will show itself. It has 39 variants...
  joetreoma   (further information)
spyware or trojan
a~nsisu.exe made modifications to my registry and added temp files. Shortly thereafter, my Norton reported a Vundo infection. Last night, norton detected adn cleaned b~nsisu so I think it is entirely related to spyware adn trojans, regardless the few legit uses.
It tries to reinstall itself by placing a command in Windows session manager on reboot.. Log on in Safe Mode and run Safer-Networking Spybot S&D. Then manually check the Session manager before every reboot, you can remove the commands to reinstalls. Also remove the file in the Temp directory in all accounts. I also found that it was related to or tried to reinstall with Viewpoint Media manager. I found both commands in Session manager waiting for a reboot.
It's created during the uninstall of some programs that use the Nullsoft Scriptable Installer System
    (further information)
scan found it after uninstalling Wild Tangent Games
  Eh Yeahbut  

Rating chart

Summary: Average user rating of A~NSISu_.exe: based on 21 votes with 20 user comments. 2 users think A~NSISu_.exe is essential for Windows or an installed application. One user thinks it's probably harmless. 2 users think it's neither essential nor dangerous. 7 users suspect danger. 9 users think A~NSISu_.exe is dangerous and recommend removing it. 2 users don't grade A~NSISu_.exe ("not sure about it").

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Best practices for resolving A~NSISu_ issues

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

A~NSISu_.exe [all]