Installer

When you download new software to your computer, you'll often need to run its installer first. An installer program contains a compressed and packaged version of an application in a single file to make it easier to download. When run, it unpacks it to your Program Files folder (in Windows) or Applications folder (on macOS). An installer may install an application for the first time, or update an older application to the newest version.

Installers may also make changes to your system configuration settings. Many applications will associate with a particular file type, automatically opening files of that type in the new application whenever you double-click one. Installers may also tell your operating system to run the new application automatically whenever the computer boots or make other changes to how your operating system runs. Some system configuration changes may require you to reboot your computer after running an installer.

Not every application needs an installer. Some applications that don't require system configuration changes, resource folders, or file associations may be opened and run no matter where they are. You may find it helpful to place these applications in your Program Files or Application folder regardless to make them easier to locate when you need them.

NOTE: Many installers will create an uninstaller program that will automatically remove the application, its resource folders, and the system configuration changes if you don't want the application anymore.

Updated January 6, 2023 by Brian P.

quizTest Your Knowledge

Most spreadsheet applications import which file format?

A
BMP
0%
B
STL
0%
C
RTF
0%
D
CSV
0%
Correct! Incorrect!     View the CSV definition.
More Quizzes →

The Tech Terms Computer Dictionary

The definition of Installer on this page is an original definition written by the TechTerms.com team. If you would like to reference this page or cite this definition, please use the green citation links above.

The goal of TechTerms.com is to explain computer terminology in a way that is easy to understand. We strive for simplicity and accuracy with every definition we publish. If you have feedback about this definition or would like to suggest a new technical term, please contact us.

Sign up for the free TechTerms Newsletter

How often would you like to receive an email?

You can unsubscribe or change your frequency setting at any time using the links available in each email.

Questions? Please contact us.