After I turn on my HP notebook with my password it is telling me to install an operating system on

[Jayr6211]

My HP notebook is telling me this: Please install an operating system on your hard disk.

But I doesn't have a hard disk.  BUT  It can hook up USB.

[A_Gayathri]

Hi @Jayr6211 ,

Welcome to The HP Support Community.  

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

I understand you are facing an issue with your HP Product. Not to worry I will help you to get a resolution to resolve the issue.

To assist you better May I know if you have observed any error messages or error code 
 

Please try the following Troubleshoots steps. 

1.    Turn off the Unit.

2.    Disconnect the AC adapter.

3.    Remove any discs from the disc drive.

4.    Remove memory cards from the card reader slot.

5.    Disconnect all nonessential peripheral devices, such as printers, scanners, external hard drives, and USB flash drives.

6.    Disconnect the AC adapter press and hold the power button for approximately 15 seconds.

7.    Reconnect the AC adapter, and then turn on the computer.

Step 2

Turn off the unit and please press and hold the Windows key + letter B key and the power button together for 30 seconds after 30 seconds, 1st release the power button but keep holding the Windows key and B key for ten more seconds and then release these two keys If done correctly, you will see the display flashing once. Please attempt it thrice as this step and restart the unit.

Step3

The unit has to be turned off, Press Win+ V while holding these two keys then Press the Power button, continue to hold all three keys for 30 seconds and then release the Power button first and then release these two keys Please attempt it thrice and then you may get a Pop-Up CMOS Check and it will restart the unit. 

Even if you don't get a Pop-up restart the unit manually after 3 attempts.

please run the hardware test  HP PCs - Testing for hardware failures and let us know 

I hope this helps. 

Take care and have a good day.

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution.