Installing software isn’t just “copying files” — it’s registering a program with the operating system so it can run, appear in the Start menu, and open associated files.
Behind the scenes, installers copy components, create settings/data folders, and set file associations. The OS itself is also “installed,” laying the foundation for every other app.
If app stores on phones feel simple, that’s because they automate the same steps: download → register → add an icon → launch.
In the previous post, we looked at the basic programs that come pre-installed with Windows. Tools like Notepad, Paint, and Calculator are already included, so you can use them right away. But as you continue using a computer, you’ll quickly find that the default apps aren’t always enough. For specialized tasks, you install additional software — that’s where installation comes in.
What “Install” Really Means
Think of installation like furnishing a house: the OS is the house itself; apps are the furniture and appliances you bring in. Copying an app’s files isn’t enough — the OS must recognize and register the program so it can be launched and integrated with the system.
What Happens Behind the Scenes
- Copy program files to the proper locations.
- Create folders for settings and data.
- Register the app so it appears in Start/desktop and can be uninstalled cleanly.
- Associate file types (e.g., .docx → Word) so double-clicking opens the right app.
- Configure optional services, shortcuts, context-menu items, or auto-updates.
OS Installation vs. App Installation
Interestingly, the operating system is also “just software” — a very large foundation that must itself be installed onto a drive. Once Windows is installed and the PC can boot, you can add apps like Office, media tools, or photo editors to build your complete environment.
The Smartphone Analogy
On phones, installing from the App Store/Google Play automates the same steps: download, register, add an icon, launch. Windows apps tend to be larger and may ask a few extra questions, but the principle is identical.
Why Installers Ask Questions
- License agreement — legal permission to use the software.
- Install location — where the app’s files will live.
- Shortcuts — Start menu/desktop entries for quick access.
- File associations — which file types open with the app.
- Optional components — plug-ins, language packs, auto-update, etc.
Each choice simply tells the OS how to register and present the app to you.
Key Takeaways
- Installation = registering a program with the OS so it can run properly.
- Behind the scenes: copy files, create data folders, add Start/desktop entries, set associations.
- The OS itself is installed first; apps are added on top to expand capabilities.
- Phone app installs are the same concept, just more automated.
You can view the original Korean blog post at the link below