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I have an office machine that's running a full OEM Windows 7 Professional x64, and I've been handed a full retail Windows 7 Ultimate x64 DVD and key to upgrade the machine with. I had assumed that Microsoft would facilitate this process, instead I got the following error when I run setup.exe and clicked "Install Now":

Error: 80070005 - Windows was unable to create a required installation folder

I followed the instructions at: http://support.microsoft.com/kb/968003

This is all being done a BootCamped Mac.

But now I'm wondering if I've made a mistake by doing so.

Can anyone help?

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What other issues are you having? Or is it 'just' refusing to upgrade? – Journeyman Geek Mar 7 '12 at 13:08
@JourneymanGeek It's "just" refusing to upgrade. It's essential that it does upgrade. – Django Reinhardt Mar 7 '12 at 13:08

migrated from serverfault.com Mar 7 '12 at 13:06

1 Answer

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Apparently Apple is to blame (as usual). You're supposed to have to install the following utility to unmount the Apple partition while you upgrade.

http://support.apple.com/kb/TS3172

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Are you running a support version of BootCamp and OS X? – Ramhound Mar 7 '12 at 15:42
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Nice catch - this worked perfectly. I was experiencing the same issue while installing Win8 to a new partition, but this corrected the problem. – David Lively Jul 5 '12 at 19:12
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Worked for me! Required a restart then I could install. – Nathan Moinvaziri Aug 18 '12 at 1:31

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