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HDD won't take OS; it had an OS just ten minutes ago

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#1 stebbinsd


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Posted 30 December 2017 - 04:59 PM

I got a replacement PSU because of the problems I was experiencing in this thread.


So I shut the computer down and install the new PSU. I then turn the computer back on, and it says that no OS is found.


BULLbleep! I just had an OS installed on the computer TEN MINUTES AGO!


Arrrrgh! Ok, I insert my OS install disk and fire it up again. I go to format the hard drive, deleting every file in it, since I know that's something I have to do.


So when I format the hard drive, Windows won't let me install the OS to that disk! I get this message:


"Windwos cannot be installed to this disk. The selected disk has an MBR partition trable. On EFI systems, Windows can only be installed to GPT disks."


HOW?! I just had Windows installed to that disk LITERALLY TEN MINUTES AGO!!!!!!!!!!!!!


Every google search I can find says that I simply need to "format" the disk first. I've already done that!


What have I done?! All I want is a working computer! Is that too much to ask?!?!?!?!



My current build:


Motherboard: Gigabyte GA-970A-UD3P
Processor: AMD FX-8350
RAM: 16GB (2x8GB DDR3)
Video Card: Geforce GTX 1070ti

OS: Windows 7 64-bit Ultimate

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#2 JohnC_21


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Posted 30 December 2017 - 05:41 PM

Boot the Windows install disk. At the screen where you see language press Shift + F10 to open a command prompt. Type the following commands.


diskpart                Opens the diskpart command window

list disk

select disk X        Where X is the disk number you will be installing Windows to.

clean                     Deletes all existing partitions. If you have one hard drive it will be 0. Make sure you selected the correct disk in the previous command

convert gpt           Initializes the disk as gpt in order to boot from a UEFI computer. MBR cannot boot from a UEFI enabled computer

exit                        Exits out of diskpart

exit                        Exits out of command prompt


Continue with the install.When you get to the Window showing the disk click next and Windows will automatically partition and format the drive.

#3 OldPhil



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Posted 31 December 2017 - 05:37 AM

Re check your cable connections, did you get all the plugs back where they belong?

Honesty & Integrity Above All!

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