1. Press Windows Logo button on the taskbar (previously called Start Button) which is on the lower left corner by default.
(A menu will pop up).
2. Move your mouse cursor and place it on "Computer".
3. Press the left mouse button. (You will hear the click sound on the mouse.) The left button is on the left side of the mouse, if you are using a right-handed mouse.
4. Another "window" will pop up.
5. Navigate (move your mouse cursor to the icon which represents the CD/DVD drive in your system where you have inserted your cd.
6. Now right-click (press the right mouse button) over that icon.
7. One more window will pop-up.
8. Navigate again to "Explore" from the sub-menu.
9. Another window will pop up.
10. Now look for a file called SETUP. If you have default options enabled, you won't be able to see the extensions of the files. There may be more than one SETUP file listed, and the executable file (the file with .EXE extension) will be the one with a beautiful colored icon.
11. Now DOUBLE-CLICK on this icon. (Double clicking means, press the left-mouse button TWICE in a quick succession).
12. This will open up, yet, another window which will begin the installation process. And then more windows wil pop up until you complete the installation process.
13. After installation, to load the game, press the Windows button on the lower left corner again, (press means click with your left mouse button, NOT pressing on the screen directly, unless of course, if you have a touchscreen.) Then navigate to Quake III menu on the Programs menu, and click again on the Quake III Team Arena Icon.
13. Welcome to Windows. You'll get used to it!
🤣
QUAKE II onwards are NOT DOS Games!!!
DOSBOX is ONLY for DOS Games and Programs.
And, uh,...did I mention that Quake III is not a Dos Game already?
🤣
(jk)