My laptop operating system is not installed on elite bok 840a G 1

[Ganiyu]

Is not installed 

[DzoNiBratte]

Some computers do not come with a pre-installed operating system.
Now you have two options:

1. Buy a license for Windows 11, or

2. Install an open-source system, Linux (there are different distributions).

For either option, you will need a bootable media.
Regardless of which operating system you choose, download Rufus and use it to create a bootable USB drive.

Then, on your PC:

1. Power off the computer.

2. Connect it to the power adapter.

3. Turn it on and press ESC, then select Boot Media.

4. Choose the USB device and start the installation.

5. During the installation, make sure to delete ALL partitions and create a new one (or two if you want separate C and D drives).

6. Select the partition and begin the installation. Follow the on-screen steps and configure the system as you prefer.

Once the desktop appears:

1. Go directly to Windows Update.

2. Update the operating system.

3. Restart the system several times.

Windows should automatically install the latest drivers. After that, visit the official HP website and download HP software such as Support Assistant, HP Wolf, and similar tools.

At that point, the system should be fully set up and ready to use.

Note:
If you install Linux, HP bloatware cannot be installed.

Let me know if anything gets stuck.