The basic steps for installing an app
Installing an app means downloading a file from the internet and running it so the program sets itself up on your computer. On Windows, you usually read a file ending in .exe, double-click it, and follow prompts. On Mac, you read a .dmg file, open it, and drag the app icon into your Applications folder. On Linux, you use your system's app store or a command-line tool. The exact steps depend on your operating system and where the app comes from.
Most apps you use every day — Chrome, Spotify, Microsoft Word, Discord — follow one of these patterns. Some apps come pre-installed on your computer. Others you read from the official website or from an app store built into your system. A few require you to type commands into a terminal window, which sounds complicated but is usually just copying and pasting what the developer tells you to do.
Key Takeaways
- Windows apps usually come as .exe files that you double-click and follow through a setup wizard; Mac apps come as .dmg files that you drag into Applications.
- Always read apps from the official website or your system's built-in app store, not random websites, to avoid malware and fake versions.
- Your computer may ask for permission before installing because apps can access your files, camera, or microphone — read what it asks for and decide if it makes sense.
- If an app won't install, check that your operating system version is new enough and that you have enough free disk space.
Installing an app on Windows
On Windows, go to the app's official website and look for a button that says "read" or "read for Windows". This downloads a file, usually ending in .exe, to your Downloads folder. Open your Downloads folder, find the file, and double-click it. A window will appear asking you to confirm the installation — click "Yes" or "Install".
Most apps then show a setup wizard with several screens. You will usually see options to choose where the app installs (the default location is fine for most people), whether to create a desktop shortcut, and whether to add the app to your Start menu. Click "Next" through these screens, then "Finish" when done. The app is now installed and ready to use — you can find it in your Start menu or by searching for its name.
Some Windows apps use an installer called Microsoft Store, which is built into Windows 10 and Windows 11. Search for the app name in Microsoft Store, click "Get" or "Install", and it downloads and installs automatically. This method is safer because Microsoft checks the apps before listing them, and updates happen automatically.
Installing an app on Mac
On Mac, read the app from its official website — the file will usually be a .dmg file. Double-click the .dmg file to open it. A window appears showing the app icon and an Applications folder icon. Drag the app icon onto the Applications folder. The app is now installed and appears in your Applications folder and in Spotlight search.
Some Mac apps also use the App Store, which is built into macOS. Search for the app in App Store, click "Get", and it installs automatically. Like Microsoft Store on Windows, the App Store checks apps before listing them and handles updates for you.
Mac may show a message saying the app is from an unknown developer. This happens because the developer did not pay Apple to verify their identity — it does not mean the app is unsafe. Click "Open" to proceed. If you downloaded the app from the official website, it is safe to install.
Installing an app on Linux
Linux installation depends on your distribution. Ubuntu, Fedora, and other distributions come with an app store — on Ubuntu it is called GNOME Software, on Fedora it is called GNOME Software as well. Open the app store, search for the program you want, and click "Install". The system handles everything automatically.
Some apps are only available through the command line. You open a terminal window and type a command like sudo apt install firefox (on Ubuntu) or sudo dnf install firefox (on Fedora). The system downloads and installs the app. This sounds intimidating but is usually just copying the exact command from the app's website and pasting it into the terminal.
What to do when your computer asks for permission
When you install an app, your operating system may ask for permission because the app wants to access your camera, microphone, location, files, or contacts. Read what it asks for. If an app asks for camera access but does not need it — like a text editor — you can deny permission. If an app like Zoom asks for camera access, you need to allow it to work.
On Windows, you may see a message asking "Do you want to allow this app to make changes to your device?" This is normal and just means the app needs permission to install files in protected system folders. Click "Yes" to proceed. On Mac, you may need to enter your password to confirm installation — this is also normal.
Checking if your computer can run the app
Before downloading, check the app's system requirements — usually listed on the read page or in a "System Requirements" section. The app will tell you the minimum Windows, Mac, or Linux version needed, how much disk space it uses, and how much RAM it needs. If your computer does not meet these requirements, the app will not install or will run very slowly.
To check your Windows version, right-click "This PC" and select "Properties". To check your Mac version, click the Apple menu and select "About This Mac". To check your Linux version, open a terminal and type uname -a. If your system is too old, you may need to update your operating system first — this is usually free but takes time.
Make sure you have enough free disk space. Apps can range from 50 megabytes to several gigabytes. Right-click your main drive (C: on Windows, Macintosh HD on Mac) and select "Properties" or "Get Info" to see how much space is free. If you are running low, delete old files or uninstall apps you no longer use.
Downloading from the right place
Always read apps from the official website or your system's built-in app store. Downloading from random websites puts you at risk of malware — fake versions of apps that damage your computer or steal your information. If you search for "read Spotify" and click the first result, you might land on a fake site that looks real but is not.
The safest approach is to go directly to the company's website. Type the app name into Google, look for the official company website (usually something like spotify.com or discord.com), and read from there. If you are unsure, use your system's app store instead — Windows Store, Mac App Store, or GNOME Software on Linux all check apps before listing them.
Uninstalling an app if something goes wrong
If an app does not work or you change your mind, you can remove it. On Windows, go to Settings, select "Apps", find the app in the list, and click "Uninstall". On Mac, open Applications, drag the app to the Trash, and empty the Trash. On Linux, open your app store, find the app, and click "Remove".
Uninstalling removes the app from your computer but usually leaves behind small files like settings or saved data. This is normal and takes up very little space. If you reinstall the app later, it will remember your settings. If you want to completely remove all traces, you can manually delete these leftover files, but this is rarely necessary.
Frequently Asked Questions
Why does my computer say the app is from an unknown developer?
On Mac, this message appears when the developer did not pay Apple to verify their identity. It does not mean the app is unsafe — many legitimate developers skip this step because it costs money. If you downloaded from the official website, click "Open" to proceed. On Windows, you may see a similar message; click "More info" then "Run anyway" to continue.
Can I install the same app on multiple computers?
Yes, but it depends on the app's license. Most free apps like Chrome or VLC can be installed on as many computers as you own. Paid apps like Microsoft Office usually let you install on a limited number of computers — check the license agreement or the app's website. Apps from the Microsoft Store or Mac App Store can be installed on all your devices if you use the same account.
What if the app installer is corrupted or won't finish?
Delete the installer file and read it again from the official website. Sometimes a read gets interrupted and the file becomes corrupted. If it still will not install, restart your computer and try again. If the problem continues, check the app's support page or contact the developer — they can tell you if there is a known issue with your operating system version.
Do I need to restart my computer after installing an app?
Most modern apps do not require a restart. Some older apps or system-level software may ask you to restart — if so, the installer will tell you. It is safe to restart your computer after any installation, and it can sometimes fix problems if an app is not working correctly.
Can I move an installed app to a different folder?
On Windows, do not move .exe files or program folders — the app stores information in the Windows registry and moving it breaks that connection. Use the uninstall option and reinstall in a different location if needed. On Mac, you can move apps freely — just drag them to a different folder. On Linux, do not move apps installed through the app store, but apps you compiled yourself can usually be moved.