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Clean install failed?


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#1 Willabong

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Posted 08 September 2015 - 04:15 AM

A while ago I posted about changing my W10 32 bit install which works flawlessly, to a W10 64 bit install.

My desktop PC is fully 64 bit compliant and before upgrading I ran a full retail version of W7 (I have both 32 and 64 bit versions).

 

Anyway, I backed up everything I wanted to keep to a spare usb hard drive, and put the install disk saved from an ISO  64 bit version of W10 into my DVD drive and re-booted.

The setup started and I got as far as the option to perform a repair or custom install, I choose 'custom' and a screen appeared showing my drive partitions and various options including 'format'.

 

That is where the problems started:  I could not format my drive (format option did nothing), and got this error message:  " Windows cannot be installed to this disk. The selected disk has an MBR partition table on EFI systems,Windows can only be installed to GPT disks."

 

Anyone got any idea what this means?

 

So I re-booted again and tried to start the already installed 32 bit version ..... It wouldn't start! Instead I got messages saying that the system was trying to repair Windows, this ultimately failed, and I haven't been able to start W10 since?

 

I also found out that no restore points have been saved, so can't go back to a working version.

 

Any ideas what I should do to correct this problem? Or better still how to install the 64 bit version? 


Edited by Willabong, 08 September 2015 - 04:16 AM.


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#2 Aura

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Posted 08 September 2015 - 05:37 AM

Hi Willabong :)

This error message is asking you to convert the hard drive where you'll install Windows 10 to a GPT partitionned one, and not a MBR one like it is now. You can avoid that by disabling UEFI in the BIOS, but I suggest you to convert your hard drive to GPT and leave UEFI and the Secure Boot enabled. To convert a drive to GPT during the installation, follow the instructions below.

During the setup, press on the Shift + F10 keys to bring up the command prompt. From there, enter the diskpart to open it's utility. Now, enter list disk and identify the hard drive on which you'll install Windows 10. Once done, enter select disk X where X is the number of the disk you identified. From there, enter the command clean followed by convert gpt and it'll convert your hard drive to a GPT partitionned one. After that, you can simply enter exit to get out of the utility. Be aware that this will delete and erase every single partitions and data on your drive. So make sure you back them up somewhere else prior to doing that.

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#3 Willabong

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Posted 08 September 2015 - 05:56 AM

Thanks Aura, done that, and everything seems to be installing now?

Will let you know how it goes?



#4 Willabong

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Posted 08 September 2015 - 06:43 AM

Aura, I have reached the "It's time to enter the product key" screen. Should I leave this blank or enter the W7 key, or the key I copied from Belarc Advisor on the old W10 install?



#5 Aura

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Posted 08 September 2015 - 06:54 AM

Try to enter the product key you got from Belarc Advisor on your old Windows 10 installation.

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#6 Rocky Bennett

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Posted 08 September 2015 - 02:31 PM

I just looked at this;

 

http://www.howtogeek.com/228042/how-to-switch-from-32-bit-windows-10-to-64-bit-windows-10/


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#7 Willabong

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Posted 08 September 2015 - 04:22 PM

Aura, sorry I didn't get back to you sooner, but something came up and I had to go out for some time!

Anyway everything went smoothly after your help, and the Belarc Advisor Windows key was the right one! Windows 10 the 64 bit version is up and running!

 

Thank you for your help, it is much appreciated! :thumbsup:



#8 Aura

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Posted 08 September 2015 - 04:24 PM

No problem Willabong, you're welcome :)

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