how to install windows 8 after windows 10

[mfarooq]

I have HP Pavilion Laptop. It was with windows 8. 2 moths before I installed windows 10. 

now I want to go back originally installed windows 8. I downloaded windows 8 from Microsoft but, during installation, the key is not matching with the currently installed key.

How i can install original windows 8?

[Paul_Tikkanen]

Hi:

W8 is not available for download.  You would only be able to install W8.1.

Here is how you can install W8.1 by using the W8 product key in your notebook's BIOS.

Install W8.1 by creating the Microsoft installation media, using another Windows PC, if yours is not working...You want W8.1 64 bit.

https://www.microsoft.com/en-us/software-download/windows8ISO

If you are asked to enter a product key during the installation process, use this generic key.

This is the generic key for W8.1 'Standard.'

334NH-RXG76-64THK-C7CKG-D3VPT

When you get to the screen that asks 'Where do you want to install Windows,' delete every partition on the hard drive, leaving just one partition of unallocated space. Click Next, and W8.1 should begin to install.

If you had to enter the generic key, manually change the generic product key to the W8 key in your PC's BIOS in the PC settings menu.

After you get W8.1 installed, and you had to manually enter the W8.1 generic product key, you will need to run the free utility I zipped up and attached below, that will show you show the W8 product key in your PC's BIOS.

I have also zipped up and attached below, the Microsoft tool which hopefully will transfer the ISO file to a DVD or USB flash drive so it is bootable.

Then you can install the available drivers and software from your PC's support page.

https://support.hp.com/us-en/drivers/selfservice/HP-Pavilion-15-Notebook-PC-series/5401225/model/661...

[mfarooq]

Thanks dear for your quick reply. after the windows 10 installation, i installed a bios driver from the hp site. is it fine or need to do something.

[Paul_Tikkanen]

You're very welcome.

It shouldn't matter if you installed a BIOS update when you were running W10.

It should be fine with W8.1 installed as well.