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MSI is an installer package file format used by Windows. Its name comes from the program's original title, Microsoft Installer, which has since changed to Windows Installer. MSI files are used for installation, storage, and removal of programs. EXE file, to open and install the program.

While trying to install .msi file in Computer with Windows Vista, 7, 8, 10 as OS, we encounter an error Looks like: 👇
The installer has encountered an unexpected error installing this package. This may indicate a problem with this package. The error code is 2869.


This will happen because of the UAC (user access control) feature of Windows.

If you are defined as administrator on Windows (Vista, 7, 8, 10 as OS), actually you are only temporarily granted administrator privileges while running programs.

Therefore MSI Custom Actions that interact with the system and require administrative privileges will fail to run the program.

Follow the below steps to fix this error:
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Step 1-: Copy .msi file to the root directory of your main hard drive (i.e. C:\).

msi file
Credit Source: google images

Step 2-: Open Windows Notepad.

techpoison notepad logo image
Credit Source: google images

Step 3-: Copy this text into windows notepad:
msiexec /i C:\program_name.msi
(You can write the total path of your .msi file in the system, after msiexec /i C:\)

Step 4-: Replace the text program_name in the code that you copied with the actual name of the .msi file.

Step 5-: Click File > Save As

Instead of saving it as a .txt file, change the file name to ⇤ ⇥
installer.bat 
save the file to your desktop.

Step 6-: On your desktop, right-click on the file and select Run as Administrator.

This will run the .msi file properly to install the application in the system.

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