4 ways to install games in windows 
1. from Microsoft Store 

Step 1: Make sure that you have a Microsoft account

Step 2: Open the Microsoft Store

Step 3: Browse the games available in the Microsoft Store

Step 4: Download and install games from the Microsoft Store

Step 5: Run the game(s) that you downloaded from the Microsoft Store

2. from CD
  1. Close all running applications.
  2. Insert the game disc into your computer.
  3. Click Yes
  4. If the installer window doesn't open, open 
  5. Follow the on-screen instructions.
  6. Select a setup language and click 
  7. Select the 
  8. Select an installation location, then click 
  9. Select shortcut options, then click 
  10. Enter the game's key, which is usually found on the back of the CD's case or in the manual.
6. Click Install when prompted.

7. Click finish

3. from Stream

  1. Open the Steam website.
  2. Click "Install Steam".
  3. Click "Install Steam Now".
  4. Run the installer and follow the prompts.
  5. Launch Steam and wait for it to update.
  6. Log in with your account or create a new one.
  7. Use the tabs along the top of the Steam window to navigate.
  8. Set a new location for games to be installed (optional).
  9. Open the Library tab to view your purchased games.
  10. Double-click an uninstalled game to begin installing it.
4. from Browser 
  1.  Download games from a different site (Best sites to download)
  2. After downloaded

  3. It depends on what type of files you have downloaded.

    • If it’s an executable file (.exe), simply double click on it and go on with the installation wizard
    • If it’s an ISO image (.iso), with Windows 10 you simply right click -> Mount and it will use this iso file as if it was a DVD. It should prompt you the installer. If it does not, go in My Computer and double click on the DVD you’ll see there with your file name.
    • Most of the time you’ll have compressed files, either in .zip or .rar. You simply download 7zip or WinRAR and uncompress them, then you should have your executable or iso file.