---
title: "Difference Between Click Once Application and Windows Installer"  
description: "Difficulty in application updatesIn Microsoft windows installer deployment strategy the entire application needs to be reinstall whenever an applicati"  
author: "Anonymous User"  
published: 2011-01-24  
updated: 2014-09-18  
canonical: https://www.mindstick.com/blog/101/difference-between-click-once-application-and-windows-installer  
category: "setup"  
tags: ["setup"]  
reading_time: 1 minute  

---

# Difference Between Click Once Application and Windows Installer

##

##### Difficulty in application updates

In [Microsoft](https://www.mindstick.com/articles/12301/microsoft-is-trying-to-kill-passwords) windows installer [deployment](https://www.mindstick.com/articles/325966/process-of-application-development-and-deployment) strategy the entire [application needs](https://www.mindstick.com/interview/22969/an-android-application-needs-to-access-device-data-e-g-sms-messages-camera-etc-at-what-stage-user-needs-to-grant-the-permissions) to be reinstall whenever an application is updated while in the case of click once deployments strategy application updates are provided automatically. Firstly only the modified portion of the application is downloaded, and then the entire application is downloaded. Lastly only the update application is reinstalled from a new [side by side](https://www.mindstick.com/forum/12815/display-two-fields-side-by-side-in-a-bootstrap-form) folder

##### Impact to users computer

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Application are resides on shared location so that resulting in version conflicts such as more than one assembly have a same version number while in the case of click once deployment each application is self contained and does not interfere with other applications.

##### Security Permission

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Windows installer [methodology](https://www.mindstick.com/interview/580/which-methodology-you-follow-in-your-test-case) requires administrative [permission](https://www.mindstick.com/forum/159434/linux-service-permission-denied-error-adjust-permissions) for installation and un installation strategy while Click Once deployment does not needs administrative rights for installation and un [installation process](https://answers.mindstick.com/blog/338/basic-requirements-and-ollama-installation-process) except only code access [security](https://www.mindstick.com/articles/43813/new-security-technologies).

---

Original Source: https://www.mindstick.com/blog/101/difference-between-click-once-application-and-windows-installer

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