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Will it be possible to upgrade from Windows 8 RC to the RTM version?

I've seen the upgrade offer from Microsoft that allows upgrading to Windows 8 from Windows XP, Vista and 7.

If I already upgraded my Win7 to Win8 release preview, do I have to downgrade first to upgrade to final windows 8 ?

Can I upgrade to final windows 8, if I did a clean install of Win8 release preview ?

Thanks in advance.

UPDATE

More to the point.

I'm not worried about settings... I'm wondering whether, if I do a clean install of RP, (for free, obviously), will I get Win 8 Pro for $40 ? Or do I have to do an upgrade from Windows 7 ?

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marked as duplicate by nhinkle Oct 20 '12 at 6:02

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3 Answers

up vote 3 down vote accepted

It hasn't been confirmed, but accorind to Paul Thurrott and Mary Jo Foley on Windows Weekly (http://twit.tv/ww) you will be able to upgrade from RP to RTM, but you won't keep your settings.

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Thanks @Rev. I'm not worried about settings... I'm wondering whether, if I do a clean install of RP, (for free, obviously), will I get Win 8 Pro for $40 ? Or do I have to do an upgrade from Windows 7 ? –  Madushan Aug 6 '12 at 1:13
    
I believe as long as you have a computer that can run the program (meaning any Windows installation) you should be able to use the $40 method. It may even work for pirated or unactivated copies of Windows, but obviously that's not legal. We won't know for sure until Windows 8 comes out for sure. –  Rev Aug 6 '12 at 13:17
    
awesome... thanks. That's what I wanted to know. –  Madushan Aug 6 '12 at 21:45
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It appears that it will be possible for $40. See here for more information.

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Upgrade from Preview to RTM works even without loosing settings. When you get following error message while installing Windows 8 you can just do below simple change.

You can't upgrade this prerelease version of Windows. Go to http://go.microsoft.com/fwlink/?LinkID=142337 to see how to install Windows and keep your files and settings.

Just change one file in the installation directory. I'm using a USB Stick to install Windows 8 and changed the file /sources/cversion.ini to

[HostBuild]
MinClient=7100.0
MinServer=7100.0

Before it was twice the value 8508.0.

Then the upgrade from a Windows 8 Preview to RTM worked without any problems. Even after some days of usage no problem discovered. But be aware - this is officially not possible, so you may have issues that aren't known so far...

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When I upgrade this way, given that I clean installed Win 8 RP (not upgraded from Win 7), does that mean I can upgrade with the $40 upgrade deal ? or do I still have to buy the full Win 8 key ? –  Madushan Oct 5 '12 at 0:16
    
I don't know - I hope so, because you have a valid Windows 7 licence, so it should be possible, otherwise you just call Microsoft and tell that you've tested the Windows8 Preview prior to Upgrade. I'm sure they will give you a licence for $40. –  FiveO Oct 5 '12 at 11:00
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