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I'm trying to install the Win10 64Bit technical preview in VirtualBox VM, but I keep getting errors. While digging into this I found online many suggestions to set the Windows version of the VM to "Windows 8.1 (64Bit)". Problem is, I don't have that option, even though VirtualBox says I'm on the most recent version.

Where is this option and how can I correct?

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  • Which version of VB are you using? Is you Windows 7 host 32 or 64 bit? Does your CPU and motherboard support VT-x or AMD-V? Do you have any other hypervisors installed on the host?
    – Ƭᴇcʜιᴇ007
    Feb 3, 2015 at 22:15
  • VirtualBox 4.2.12 (when I ask it to update it says current), Host is 64bit Win7, AMD processor, so I believe AMD-V supported. Only other hypervisor is WIndows Virtual PC.
    – MAW74656
    Feb 3, 2015 at 22:25
  • "so I believe AMD-V supported." you'll need to confirm that, and ensure it's enabled.
    – Ƭᴇcʜιᴇ007
    Feb 3, 2015 at 22:26
  • Yeah, AMD-V confirmed and enabled. I'm running some win7 32 and 64bit VMs, so no issue there.
    – MAW74656
    Feb 3, 2015 at 22:29

1 Answer 1

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Your version of VirtualBox is old. They are currently up to v4.3.20.

Instead of trusting a now out-of-date update checker, head directly to the VirutalBox site and download the latest version.

https://www.virtualbox.org/wiki/Downloads

Direct link to current version (4.3.20) for Windows

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  • Damn, that update checker threw me off. Downloading the new version clearly shows the 8.1 option.
    – MAW74656
    Feb 3, 2015 at 22:40

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