Boot device not found need an operating system on a USB drive to get this computer running

[Rubbergears]

Need a USB drive to get this computer running I don’t have a CD ROM 

computer says boot device, not found

please install an operating system on your hard disk

did a battery replacement and all information including the operating system are gone

[VikramTheGreat]

Hi @Rubbergears,

Welcome to the HP Support Community.
 

Thank you for posting your query. I will be glad to help you.

Since your HP PC is showing a “Boot device not found” error and the operating system is missing after a battery replacement, you’ll need to create a bootable USB drive to reinstall Windows. Here's how to do it using HP and Microsoft tools.

Step-by-Step: Create a Bootable USB to Reinstall Windows
 

🔧 Option 1: Use HP Cloud Recovery Tool (Recommended for HP PCs)

This will reinstall the original OS and drivers that came with your HP device.

1. On another working Windows PC:
   • Download the HP Cloud Recovery Tool:
     👉 HP Consumer PCs - Using the HP Cloud Recovery Tool in Windows 11 and 10 | HP® Support
2. Plug in a USB drive (at least 32 GB).
3. Run the tool and enter your HP product number (you can find this on the sticker under your laptop or in the BIOS).
4. Follow the prompts to create the recovery USB.
5. Insert the USB into your affected HP PC and boot from it:
   • Turn on the PC and press Esc or F9 repeatedly to open the Boot Menu.
   • Select the USB drive and follow the on-screen instructions to reinstall Windows.

After Installation

Once Windows is installed:

• Visit Official HP® Drivers and Software Download | HP® Support to download drivers for your specific model.
• Run Windows Update to get the latest patches and security updates.

I hope this helps.

Take care and have an amazing day!
 

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Regards,

VikramTheGreat