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Windows 7: Windows can not be installed to GPT Drive

05 Jul 2015   #1

windows 7
Windows can not be installed to GPT Drive

I followed a Webtutorial to Install Windows 7 on a Laptop that had been purchased with Windows 8 preinstalled. Making it a Dual Boot System. How to Dual Boot Pre installed Windows 8 with Windows 7

I created my Partition exactly as the Instructions Suggest. Yet when i boot from the USB disk , with the iso after starting to install windows 7 it asks what disk do you want it on. But then it says can not install windows on GPT Disk... partition.

I have read further solutions that say to convert the Disk to MBR with a third party software that doesnt loose data.... but that is statrting to make me nervous that later windows 8 will be corrupted and not operate. I wanted a Dual Boot system without Loosing windows 8. (if i converted the disk to mbr , would windows 8 still run or might fail because now it is an MBR disk?instead of gpt)

How could the Authour at Startpage not have included the necessary Tips to getting the Partition to accept windows 7 iso? This laptop of mine was a Lenova that had to have The bios set to Legacy instead of UEFI to even see the USB boot Drive. I dont know if that is a

My System SpecsSystem Spec
05 Jul 2015   #2

Windows 7 Ultimate 64-bit, Windows 8.1 64-bit, Mac OS X 10.10, Linux Mint 17, Windows 10 Pro TP

I don't dual-boot [use rehabbed computers], all I can offer is that what I see as a possible issue is that both versions of Windows have to be installed the same way, according to what the BIOS is set for. You see, the information in the BIOS sets up the computer/devices and the OS/Operating System reads the BIOS to know what it has to work with and the BIOS probably would have to be changed at each bootup to accommodate the desired version.

One of the changes with Win8/8.1 OEM version is the licensing code is not directly available to the user like the Retail version which comes with a sticker/label with the code [at least my Custom Desktop did]. Both of my Win8.1 Notebooks, my wife's Notebook and my Tablet have no such sticker.
My System SpecsSystem Spec
05 Jul 2015   #3

windows 7

The article in my link to Startpage.... says it is done dual boot without problems. There is possibly a reason my factory windows 8 drive was Partitioned Gpt instead of MBR.

Someone here must know what the trick is even if i have to get a thirdparty app and format to MBR without the data loss of windows 8.... and then add windows 7 ..

then at some point later in time i will deystroy windows 8...... and wait for windows for seniors to come out....!
My System SpecsSystem Spec

05 Jul 2015   #4


It's clear that the Windows 8 PC has a UEFI BIOS' which uses a GPT disk format. To install Win7 on that you must boot it's installer as a UEFI device. If using flash stick it must be formatted specially using Option One in UEFI Bootable USB Flash Drive - Create in Windows.

Also in BIOS setup it must have all UEFI enabled but Secure Boot disabled as that only works for Windows 8, which should still work. Downgrade Windows 8 to Windows 7

Report back results with any errors.
My System SpecsSystem Spec
05 Jul 2015   #5

windows 7

Rufus says that my Windows ISO in not in the needed EFI format . I need another ISO that is in EfI Format...or change rufus target to bios

i changed the rufus target to bios and now it says i need a efi iso image.

I tried converting the DRIVE to MBR using datalossless aoemi but the program says i have more than 4 partitions on the drive and so can not convert. If i knew for sure what was on the other Factory installed drives i could delete the rest and with just four partitions Convert. But i am not that good to think i couldnt make a mistake. I put my Lenova onestep backup files on a partition. But i still dont know i wouldnt create another laptop coffee table. I would imagine the unkown factory partitions could be deleted, probably a backup of windows 8 on file... But Pcs are so different from when we were younger, i am not sure if i could delete hidden drives...

So i prefer to stay on the Suggestion oF rufus option 1...gpt on uefi.. and getting the ISO to an EFI format..
My System SpecsSystem Spec
06 Jul 2015   #6


You'd have to wipe the hard drive to convert it to MBR, then reinstall Windows 8. You might need to do that anyway if your UEFI firmware will not allow a Dual Boot using UEFI as is the case with a dwindling number of BIOS'.

How was your ISO obtained? Do you know how it was modified so that Rufus rejects it? Do you have access to a pristine ISO for your licensed version of Win7? You can extract it from DVD using ImgBUrn as discussed in Step 1 of Clean Reinstall Windows 7 but then I would use the DVD if you have an drive.

What version of Win7 do you own? Do you have the Product Key?
My System SpecsSystem Spec
06 Jul 2015   #7

windows 7

Since Windows 8 Came on this Laptop and the Bios says to select uefi only for 64 bit or Legacy support for Other os . Boot uefi first or legacy. Are the few related bios options. I am nervous as to wether MBR drive would work with the Bios from Lenova. It is an updated bios.2013.
Maby then Windows 8 would demand GPT!.

I dont even have a Backup copy of Windows 8, I was supposed to make a backup from the PC . I relied on windows backup from Lenova instead.

Windows 7 64 preactivated came from i created the usb flashdrive with windows dvd downlad tool. because rufus would not work.

I would be pretty damn nervous doing a full Format on this Laptop, as then I could only hope the windows disk would work. So many times i have seen pcs have problems at that time. But then they were deskptops that could have hardrives easily changed!

I am out of ideas... I cant even see paying a Repair shop to fix this. If i had to buy two new copies of windows. I do have the Keys for windows 8 and 7.. but not the orginal disks. I have since heard that they can be downloaded from an old Microsoft Channel in Full Copies of the orginal free. Maby that will have to be a next step.

I really dont think windows 10 upgrade will stop me from wanting windows 7 back , for a long time.
My System SpecsSystem Spec
06 Jul 2015   #8


Why are you using a preactivated Win7 torrent which is modified to bypass activation to steal the OS? I thought you said you have a Win7 Product Key. If so I just explained that obtaining legitimate or safe ISO for reinstall is discussed in Step 1 of Clean Reinstall Windows 7. Did you read it? Once you have confirmed the media it must be written to stick using Rufus from Option One of UEFI Bootable USB Flash Drive - Create in Windows then booted as a UEFI device.

Instead of going on about "what you heard" why don't you ask us as this is the top tech forums on the web where we handle these cases by the thousands, successfully in every case where there is cooperation.

Once you have confirmed media, Secure Boot must be disabled in BIOS setup, UEFI enabled with UEFI to boot first. Then the media must be booted as a UEFI device.

If it still fails we need to see pictures of the BIOS settings choices for UEFI, EFI, CSM, Legacy BIOS, UEFI/Legacy First to boot, Secure Boot and any other related settings. You can attach pictures using the paper clip icon in reply box.

You can easily Clean Install - Windows 8 using media provided in Windows 8 and Windows 8.1 ISO - Download or Create .

I asked you what version of Win7 you actually own. Do you have a DVD drive on the PC?
My System SpecsSystem Spec
06 Jul 2015   #9

windows 7

I had windows 7 on an older pc, but that is unplugged and i am wheelchair bound. SO it would likely be fall until i can get that plugged in and the key i have was likely for windows 7 home and i want to install windows 7 ultimate. So we may as well say i dont effectively have the os and key right now. Maby i could find one second hand online.

I did set the bios to not use secure boot. However with uefi only mode selected, the usb flash drive was not recognized.. so i had to enable legacy mode to load the flash.

From what i read, windows 7 should install on a GPT drive. That is an option. I shouldnt have to convert to MBR.

I will need a few days break from trying to solve this. I am too disabled. I will post again. Someday. Someone will try again then i hope.
My System SpecsSystem Spec
06 Jul 2015   #10

windows 7
We need a New Microsoft.

I just tried the Licencse from my Laptop with windows premium 7 and when i entered the licencse number at microsoft software recovery. I just get a message saying there is an error , and no special characters are allowed. I reentered it 3 times , counting oem as oem and not 0em.
My System SpecsSystem Spec

 Windows can not be installed to GPT Drive

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