I just purchased the upgrade, downloaded the files, copied to USB and did a clean install on my Windows 7 machine. I'm in the process of reinstalling my files, but had no problems installing from the upgrade. Though I had a legitimate copy of Windows 7 on the computer, Windows 8 did not bug me about the old media or old CD Key.
However, if your system does say that it cannot activate Windows 8 because you used an upgrade key, you can do the following to bypass this. Of course, this should only be done with legitimate situations.
- Open regedit by pressing Windows-q, entering regedit and selecting the result from the list of hits.
- Navigate to
HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion/Setup/OOBE/
- Change MediaBootInstall from
1
to 0
- Go back to the start screen and enter
cmd
there.
- Right-click Command Prompt and select to run it as administrator.
- Type
slmgr /rearm
on the command line and hit enter.
- Reboot Windows now.
- Run the activation utility afterwards, enter your product key to activate Windows.
@Moab he said he has a legal copy of Windows 7, and yes as far as I can tell this is possible... Once you get the media downloaded either on USB or DVD, then I am pretty sure you can install it on any disk/partition that you want, or at least that is what worked for me... – TheXed – 2012-10-27T01:13:16.137
There was a trick with W7 to do this, not sure if it works with W8, and you would need a physical disc to do it, see Method #3...http://www.winsupersite.com/article/windows-7/clean-install-windows-7-with-upgrade-media-128512
– Moab – 2012-10-27T01:16:43.093@TheX you clean installed using discounted upgrade media? – Moab – 2012-10-27T01:17:27.897
@Moab yes I did a clean install with the upgrade media... you just have to press the custom install then select your partition/disk. – TheXed – 2012-10-27T01:18:44.163
1
According to http://www.pcauthority.com.au/News/320816,boxed-copies-of-windows-8-pro-do-not-work-for-clean-installs.aspx you might be in for some trouble.
– ta.speot.is – 2012-10-27T01:22:35.0802Doing an install and activating are two distinct things. I was able to do an install clean, but not subsequently activate using my upgrade product key. – Chris W. Rea – 2012-10-27T01:48:38.470
1This question is not an exact duplicate of the linked question, they are asking two distinct things, one is, I have an install of Windows 7 on a separate hard drive and the other is I have no install of Windows 7. I understand the need to reign all the Windows 8 install questions in, but this is an unique question. – James McMahon – 2012-11-02T18:26:03.433
1Since I can no longer answer this question properly I'll just put this here. I had no issue performing a clean install of the Windows 8 upgrade on separate disc. – James McMahon – 2012-11-03T17:32:13.993