Here’s a step-by-step guide on how to install Windows on a Dell computer:

1. First, make sure you have a copy of the Windows installation media. This can be a USB drive or a DVD that contains the Windows setup files.
2. Insert the Windows installation media into your Dell computer’s USB port or DVD drive.
3. Restart your computer and press the appropriate key to enter the BIOS setup utility. This key may vary depending on your Dell computer model, but it is usually F2 or Delete. If you’re not sure, check your Dell computer’s manual or look for a message that appears on the screen during bootup.
4. Once you’re in the BIOS setup utility, navigate to the Boot options menu and change the boot order so that the computer boots from the installation media first. Save the changes and exit the BIOS setup utility.
5. Your Dell computer should now boot from the Windows installation media. Follow the on-screen instructions to install Windows on your computer.
6. When prompted, select the language, time and currency format, and keyboard or input method that you want to use.
7. Click the “Install now” button to begin the installation process.
8. Enter your Windows product key if prompted. If you don’t have a product key, you can still install Windows, but you won’t be able to activate it until you purchase a valid product key.
9. Accept the license terms and click the “Next” button.
10. Choose the type of installation you want to perform. If you’re installing Windows on a new hard drive or a computer that doesn’t have an operating system installed, select “Custom: Install Windows only (advanced).” If you’re upgrading from an existing version of Windows, select “Upgrade.”
11. Select the partition or hard drive where you want to install Windows. If you’re installing Windows on a new hard drive, you may need to create a new partition first.
12. Follow the on-screen instructions to complete the installation process. Windows will copy files to your computer and restart several times during the installation process.
13. Once the installation is complete, you’ll need to go through the Windows setup process to create a user account, set up your preferences, and install any necessary drivers and updates.

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That’s it! You should now have a fully functional copy of Windows installed on your Dell computer. If you encounter any issues during the installation process, consult your Dell computer’s manual or contact Dell support for assistance.