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I bought used Z640 for my company, HDD formated, which OS I am allowed to download

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HP Z640

I bought used Z640 for my company. Condition: very good, two xeons, 64 RAM, nice but HDD formated, computer case label: OS WIN 8.1 PRO downgraded to WIN 7 PRO. Need to know latest OS version I could legally  download and how/where.

Regards, Papre

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You can legally download W8.1 Pro from the link below, since your PC has a product key in the BIOS for W8.1 Pro.


You will need to transfer the ISO file to a DVD or USB flash drive so that it is bootable.


You can use any utility you want, but I have zipped up and attached the Microsoft tool below that will do that for you as well.

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