Q: Can't install windows 8.1 with boot camp

I'm trying to install windows 8.1 with boot camp and this is the message I keep getting. I've tried several times and every time I get this. I have a 2015 MacBook Pro. I've tried installing from a usb with ISO and also from a oem windows dvd. Any help would be appreciated.

MacBook Pro with Retina display, OS X Yosemite (10.10.3)

Posted on May 2, 2015 8:03 PM

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Q: Can't install windows 8.1 with boot camp

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by Loner T,

Loner T May 2, 2015 8:18 PM in response to Orjeff
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May 2, 2015 8:18 PM in response to Orjeff

Do you have a retail version of W 8.1?
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by Orjeff,

Orjeff May 2, 2015 8:20 PM in response to Loner T
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May 2, 2015 8:20 PM in response to Loner T

Yes I do. It had 64 and 32 bit disks and I am trying to install the 64.
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by Loner T,

Loner T May 3, 2015 5:10 AM in response to Orjeff
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May 3, 2015 5:10 AM in response to Orjeff

Is your USB a USB2 device?
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by Orjeff,

Orjeff May 3, 2015 7:36 AM in response to Loner T
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May 3, 2015 7:36 AM in response to Loner T

Yes it is a 8Gb USB2.
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by Loner T,

Loner T May 3, 2015 10:16 AM in response to Orjeff
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May 3, 2015 10:16 AM in response to Orjeff

Can you look at Create an ISO image for Boot Camp from a Windows installation DVD - Apple Support and create a new ISO from you 64-bit DVD and test?
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by Orjeff,

Orjeff May 3, 2015 6:58 PM in response to Loner T
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May 3, 2015 6:58 PM in response to Loner T

Thanks Loner T for your help you replied to my question incredibly quickly. I did a PRAM reset and tried again and it Installed first try. I have no idea why or even what a PRAM reset is ( this is my first Mac) but it worked.
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by Loner T,

Loner T May 4, 2015 5:16 AM in response to Orjeff
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May 4, 2015 5:16 AM in response to Orjeff

Excellent.

Windows installation has four or five reboots, and the Apple BootManager tracks such reboots via the Mac NVRAM, otherwise the next reboot will cause OS X to boot rather than Windows. It is also used to set up some variables used to pass information to the CSM-BIOS layer. If an installation has failed, the variables do not reflect the current and clean state of the machine. A NVRAM reset will re-initialize these variables for the next attempt.
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Q: Can't install windows 8.1 with boot camp

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