Download latest Windows 10 ISO Disc Image Files

@pcpunk: the official release iso is not like our TPs, which are all activated now.  The official downloader will not allow you to do a clean install until you first upgrade the older Windows.  So you have to clone your older Windows first, or effectively you lose it.

So you have to boot in the older Windows, insert the usb/DVD and then on the latter, click its 'setup.exe'.  This will ONLY upgrade on top of your existing Windows.  You can choose to keep all part or none of your old Windows, as you'll see in the options, but you cannot choose 'clean install' until the upgrade step has completed.

During the update process, since the key for your older Windows is embedded in that older Windows, the Win10 tool/iso looks for the old embedded license, on your machine: so YOU do not provide the key.  If the Win10 tool/iso has a problem finding that key, it might terminate or boot loop or just revert you back to your old Windows (not without damage).  And you won't know, that's why.

Only after its upgrade is successful, can you then use the same key to do a clean install.  Because by then, the key will be replaced with a Win10 key.  Which means, your old license is terminated, replaced with Windows 10 (not good, as the Win10 license is conditioned on OEM support for your device, so can be DOA).

EDIT: you don't actually see the key nor is it asked of you.  You can find out what it is by software like Belarc or Produkey, but MSFT will never ask you for the key.  Because, it thinks it fights piracy this way.

So you're better off just keeping your activated Preview, which HAD allowed you to dual boot or do clean install.

I'm still pondering whether to keep my remaining 8.0 in shrinkwrap -- which effectively dies in January -- or to install it, update it to 8.1 and then to 10.  Right now, I'm going to wait, until all this nonsense with the Terms of Service and the EULA, get sorted out.  For I will not use Win10 under the current terms.  The activated former-TP is on a tester laptop (Dell Latitude 6510), dual-booted with another retail 8.1, whose hard drive is easily removed.

Edited by brainout, 04 August 2015 - 07:58 AM.

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