What is IsUninst.exe?

The genuine IsUninst.exe file is a software component of InstallShield unInstaller by Flexera Software.
The software removal package for InstallShield, the function of IsUninst.exe is to remove InstallShield completely from your system. InstallShield unInstall includes several command line features, including the ability to perform a silent uninstall, as well as to remove just certain parts of the InstallShield package. InstallShield is distributed by Flexera Software, which is headquartered in Illionois. InstallShield is designed primarily for Windows software deployment, but can also manage mobile device software as well.

ISunInst stands for InstallShield unInstaller

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 IsUninst.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 IsUninst.exe related errors

IsUninst.exe file information

The process known as InstallShield® unInstaller belongs to software InstallShield unInstaller by InstallShield Software (

Description: IsUninst.exe is not essential for the Windows OS and causes relatively few problems. IsUninst.exe is located in the C:\Windows folder. The file size on Windows 10/8/7/XP is 306,688 bytes. 
It is an unknown file in the Windows folder. It is not a Windows system file. The program is not visible. Therefore the technical security rating is 40% dangerous, however you should also read the user reviews.

Recommended: Identify IsUninst.exe related errors

Important: Some malware disguises itself as IsUninst.exe, particularly when not located in the C:\Windows folder. Therefore, you should check the IsUninst.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

It is installed by the Hewlett Packard OfficeJet set up program. When the "suite" is uninstalled, IsUninst.exe is left as a remnant of the first installation. To operate correctly, IsUnist.exe requires the installation log which is removed after the uninstall of the HP suite. It can be deleted with impact.
IsUninst.exe is part of InstallShield uninstaller developed by InstallShield Software Corporation located in C:\WINDOWS\IsUninst.exe

Summary: Average user rating of IsUninst.exe: based on 1 vote with 2 user comments. One user thinks it's probably harmless. One user is not sure about it.

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Best practices for resolving IsUninst issues

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

IsUninst.exe [all]