Windows Installer keeps popping up or starting. Does your Windows Installer process run every time you boot Windows deviceOr maybe you are working, and it suddenly pops up randomly Why does this happen How do you stop it from running at random times in the backgroundThis post takes a look at some scenarios discusses your options. The Windows Installer or msiexec. Windows OS component and an application programming interface, located in the System. So when you see this process running, it definitely means that some software is being installed, changed or uninstalled. Many software use the Windows Installer to carry out the installation process. If this is happening with your permission and knowledge, then it is fine as you may be in the process of installing, uninstalling or repairing your installed software. But if it is not, then you need to investigate further. Installation-Failed-Windows-Installer-service.jpg' alt='How To Fix The Windows Installer Could Not Be Accessed Means' title='How To Fix The Windows Installer Could Not Be Accessed Means' />This post will probably raise more questions than answers that is something you will have to answer for yourself and that may show you the direction to work. Download Free Adobe Lightroom 4 Portable. Terminate the process manually and see if it appears again either in the current session or on restart. To do this, right click on the Taskbar and select Task Manager. Under the Process tab, you may see the msiexec. Right click on it and select End task. This will terminate the Windows Installer process. Fix Runtime Error Windows 10 Fix, Clean FIX RUNTIME ERROR WINDOWS 10 And Optimize PC SPEED Up Your PC FREE Scan Now Recommended. PC Mechanic 7. Windows 2000, Windows Server 2003, Windows XP You can download and install SubInACL. Windows 2000. Ensure that the latest version of Windows Installer is installed. Right click on msiexec. System. 32 folder, select Properties Details. The latest version as of writing is 5. Maybe your Windows Installer file has been corrupted. Run System File Checker and reboot once the scan is completed. See this post if Windows Installer Service can not be accessed. Now ask yourself, did you install any new software in the last day or two If so maybe some background process or updating is still going on. Give the Windows Installer time to run and see if it shuts down after a while. When you installed the software, did it install any third party offers Check the Control Panel. Maybe they are being installed. Check if any software which you installed or updated recently, bundled other software. If so it may be using this process. You may want to uninstall the unwanted applications. Did you download or install anything of doubtful value Maybe something is installing Malware or a PUP on your system. Run a full scan with your antivirus software along with Adw. Cleaner, which is a good tool to remove PUPs, Browser Hijackers Adware. If msiexec. exe is located in the C WindowsSystem. Microsoft process. If it is located in any other folder, it could well be malware, as malware files can me named anything. You may want also to consider re registering the Windows Installer engine. To do so, open Command Prompt, type the following and hit Enter msiexec unregister. Now to register it again, type the following and hit Enter. Download the Program Install and Uninstall Troubleshooter. This tool is the replacement for Windows Installer Cleanup utility which was discontinued. This tool will help you fix potential issues with Windows Installer. Specifically, it will fix the following problems Problems that prevent new programs from being installed, uninstalled or updated. Corrupted registry keys that are related to these issues. This troubleshooter works on Windows 1. Let us know if anything helped, or if you have other suggestions.