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I have an Ubuntu 10. 04 and Windows 7 installed on computer. Now I would like to try Windows 8 on virtual box OSE. I have a Windows 8 release preview ISO disk in a pendrive and added IDE primary slave as it 

  IDE Primary Slave (CD/DVD):   
Windows8-ReleasePreview-32bit-English.iso (1.64 GB)

This is my Windows 8 virtual box settings.

And what I see when I start Windows 8 is

What is the problem? My system RAM is 2.00 GB where 1.85 is usable? How can I fix this problem?

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I gave you an answer below but generally we can not answer questions on non-Ubuntu guest operating systems here. It may be borderline case as settings in the host are involved but still I vote for closing as off topic. – Takkat Oct 14 '12 at 6:56

closed as off topic by jokerdino♦, Takkat, Uri Herrera, Tom Brossman, devav2 Oct 14 '12 at 13:52

Questions on Ask Ubuntu are expected to relate to Ubuntu within the scope defined in the FAQ. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about closed questions here.

1 Answer

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In order to install an operating system with a PAE kernel you need to enable this in the settings for your guest OS:

enter image description here

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