Update

[MOMO1122]

Hello i need help when i updated my windows from 10 to 11 with out usbdrive through command prompt  It installed but when restarted it struck  on hp logo nothing is opening like boot menu etc.I hold power for many seconds but nothing happened.I take many time to light up the  screen and to show hp logo.My laptop is hp 840 g3

[Paul_Tikkanen]

Hi:

I recommend you use the HP cloud recovery client to make a bootable USB recovery drive that will reinstall W10, the drivers and the software that originally came with your notebook.

Here is an info link for how to use that utility:

HP Business PCs - Using the HP Cloud Recovery Client in Windows 11 and Windows 10 | HP® Support

You can download the software from your notebook's support page at the link below:

HP EliteBook 840 G3 Notebook PC Software and Driver Details

Then if you want to upgrade to W11, watch this video for how to easily do an in-place upgrade from W10>W11.

How to Install Windows 11 on Unsupported PC in 2025 (New Easiest Method, No CMD)

[MOMO1122]

Brother  nothing is happening and even boot menu is not opening. And as same your video link i installed windows  but mine not working 

[Paul_Tikkanen]

Unfortunately, I wouldn't be able to help you with that kind of problem. 

Your notebook is probably done for. 

[MOMO1122]

Ok thanks 😊 

[Paul_Tikkanen]

You're very welcome.