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21-a256in
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REINSTALL WINDOWS NEED OPERATING SYSTEM 8.1

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H6M48AA#ACJ
Microsoft Windows 8.1 (64-bit)

In my desktop os issue so i have to reinstall os 8.1 ...need ISO image 

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Paul_Tikkanen
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Hi:

 

The product specs for your PC indicate that it originally came with W8 64 bit.

 

https://support.hp.com/us-en/product/hp-pavilion-21-a200-all-in-one-desktop-pc-series/5330754/model/...

 

Here are the steps you need to install W8.1 for free by using the W8 product key in your PC'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-21-a200-All-in-One-Desktop-PC-series/53...

 

If you choose to create a bootable DVD, you will need to go into the BIOS, enable legacy mode and disable secure boot in order to boot from a DVD.

 

See this link for the settings to change...

 

https://support.hp.com/us-en/document/c03659945

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