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Windows 7: Re-install of win 7 problem with GPT error

05 Jan 2019   #1
longshanks62

windows 7 and XP
 
 
Re-install of win 7 problem with GPT error

I have been asked to re install win 7 onto a Dell inspiron 1545 laptop but there is a problem. This laptop has been formatted and has 3 primary and one unallocated partitions, using a win 7 installation disk and when at install stage it reports that "unable to install to disk because of GPT partition style.

I cannot use the "Diskpart" solution shift +F10 does not work, I am now stumped for a solution can anyone help and blow by blow please.
Regards
Brian


My System SpecsSystem Spec
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05 Jan 2019   #2
SIW2

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64
 
 

How about selecting Repair my computer, then use the command prompt

Option 2 here

System Recovery Options
My System SpecsSystem Spec
05 Jan 2019   #3
Megahertz07

Windows 7 HP 64
 
 

Is Win 10 installed on the HDD?
This an old laptop with Win Vista and probably doesn't have a UEFI BIOS so it can't have a GPT drive. Was the HDD on another computer?

To install win 7 32 (don't install win 7 64 if it has 4G or less of memory)
- Boot from Win 7 installation disk
- Go to install - advanced - delete all partitions - create new (it will format the HDD as Legacy-MBR)
- Choose the Big NTFS partition to install
My System SpecsSystem Spec
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05 Jan 2019   #4
longshanks62

windows 7 and XP
 
 

As in my orig post, this laptop has been formatted and during installation from the installation disk it will not let me choose option 1 or 2 it reports back the GPT style partition message and therefor it will not go any further.
No win 10 was not installed, but win 8 was installed before formatting.
My System SpecsSystem Spec
05 Jan 2019   #5
Megahertz07

Windows 7 HP 64
 
 

To install win 7 32 (don't install win 7 64 if it has 4G or less of memory)
- Boot from Win 7 installation disk
- Go to install - advanced - delete all partitions - create new (it will format the HDD as Legacy-MBR)
- Choose the Big NTFS partition to install

Clean Install Windows 7
My System SpecsSystem Spec
06 Jan 2019   #6
longshanks62

windows 7 and XP
 
 

The installation will not go ahead because the drive is GPT style and there is no option to change this.
My System SpecsSystem Spec
06 Jan 2019   #7
SIW2

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64
 
 

You can change it.

My boot media contains partition managers.

17514x86.iso

17514x64-v10.iso

Boot the media. You will get a desktop

The icon Re-install of win 7 problem with GPT error-aomei-icon.jpg is on the taskbar. Click it to launch AOMEI Partition Assistant. Select the data disk you want to convert and right click it, and then select Convert to MBR Disk in the drop-down menu.

Then click the Green Apply tick at top left of Aomei window.


My System SpecsSystem Spec
06 Jan 2019   #8
longshanks62

windows 7 and XP
 
 

Thanks,

it won't work for me I've tried but it reports "non system disk" insert appropriate disk.
My System SpecsSystem Spec
06 Jan 2019   #9
Megahertz07

Windows 7 HP 64
 
 

Quote   Quote: Originally Posted by longshanks62 View Post
The installation will not go ahead because the drive is GPT style and there is no option to change this.
Boot the installation disk as Legacy-MBR (the other option can be as UEFI)
My System SpecsSystem Spec
06 Jan 2019   #10
Megahertz07

Windows 7 HP 64
 
 

Quote   Quote: Originally Posted by longshanks62 View Post
The installation will not go ahead because the drive is GPT style and there is no option to change this.
That is because you're not deleting ALL partitions then creating new.
YOU MUST DELETE ALL PARTITIONS AND CREATE A NEW. IF YOU DO, THE DRIVE WILL BE LOW FORMATTED FROM GPT TO LEGACY. Then you can install.

Boot the installation disk as Legacy-MBR (the other option can be as UEFI)
- Go to install - advanced - delete all partitions - create new (it will format the HDD as Legacy-MBR)
- Choose the Big NTFS partition to install

Clean Install Windows 7
My System SpecsSystem Spec
Reply

 Re-install of win 7 problem with GPT error




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