HP OmniBook 4100 Reference Manual page 18

Introducing the OmniBook
3. Plug in the ac adapter, then connect the ac adapter to the OmniBook's right
side, as shown. The OmniBook battery starts charging.
4. Press the blue power button. The Windows 95 or Windows NT Setup program
starts automatically.
5. Follow the instructions as they appear on the screen.
During setup, you will be prompted to accept the License Agreement and enter
the Product ID (printed on the Certificate of Authenticity on the Microsoft
Windows manual). If you are prompted to set up a user account and password.
You can either set up the account, or press ESC to skip this step.
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