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Windows 7: Error related to EFI system..unable to install windows 7 64-bit

14 Jan 2013   #1
lenovog580

Windows 7 Ultimate x86
 
 
Error related to EFI system..unable to install windows 7 64-bit

Hi,
I have Lenovo g580 which had DOS preinstalled in it {i5, 500GB, 4GB} and initially I had installed Win 7 32-bit on it. At that time, it gave some problem while rebooting 1st time, but i ran repair windows option and everything ran smoothly.

But the problem came when I tried to install windows 7 64-bit on the laptop using a DVD, no matter which drive I select, it does not allow me to go ahead. When I checked the details, I got the error message which is attached here.


There is no disk controller option in BIOS, nor is there anything related to UEFI systems.
i did r&d on UEFI systems, but i want to be sure of everything before i go ahead with anything.
Any help would be appreciated.


My System SpecsSystem Spec
.
14 Jan 2013   #2
z3r010

 

Please do not post the same thread in multiple sections of the site (other thread removed).
My System SpecsSystem Spec
14 Jan 2013   #3
lenovog580

Windows 7 Ultimate x86
 
 

Quote   Quote: Originally Posted by z3r010 View Post
Please do not post the same thread in multiple sections of the site (other thread removed).
sry, was not sure where to post it, in that section or this one..thanks for the help!
My System SpecsSystem Spec
.

14 Jan 2013   #4
theog

Microsoft Community Contributor Award Recipient

ME/XP/Vista/Win7
 
 

You will need to delete all the partitions on HDD drive.

You need to do a clean install,
As the new MOBO's now have a uEFI BIOS.
How to install Windows 64 bit on a uEFI BIOS:
UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with
My System SpecsSystem Spec
14 Jan 2013   #5
lenovog580

Windows 7 Ultimate x86
 
 

Quote   Quote: Originally Posted by theog View Post
You will need to delete all the partitions on HDD drive.

You need to do a clean install,
As the new MOBO's now have a uEFI BIOS.
How to install Windows 64 bit on a uEFI BIOS:
UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with
Thanks for the help!

btw no offense to the article above..it was really helpful,
I am explaining it again cz it din't explain
>how to delete the partitions
>do we have to delete the partition with OS as well or not
>what is clean install
and few more idiotic questions a beginner might have
  1. When installing at the partition screen hit Shift+F10.
  2. At the prompt type diskpart and press Enter.
  3. Type list disk (Not the number of the disk you want to use)
  4. Type select disk X where is X is the number of the disk you want to use.
  5. Type clean. This will erase all the data on your system.
  6. Type convert gpt.
  7. Now reboot the system with the DVD/USB, and you will see only Unallocated Space. Use that to install the new windows.
Be warned though, this will clear out the partition table on the drive; make sure you have a backup before attempting this if you have important data.
My System SpecsSystem Spec
14 Jan 2013   #6
theog

Microsoft Community Contributor Award Recipient

ME/XP/Vista/Win7
 
 

Quote:
Thanks for the help!

btw no offense to the article above..it was really helpful,
I am explaining it again cz it din't explain
>how to delete the partitions
>do we have to delete the partition with OS as well or not
>what is clean install
and few more idiotic questions a beginner might have
You can delete all partitions in the Drive Options.
A clean install is installing to a clean HDD Drive.

-windows-8-downgrade-008-sb-1.png

-windows-8-downgrade-012-sb.png

Quote:
  1. When installing at the partition screen hit Shift+F10.
  2. At the prompt type diskpart and press Enter.
  3. Type list disk (Not the number of the disk you want to use)
  4. Type select disk X where is X is the number of the disk you want to use.
  5. Type clean. This will erase all the data on your system.
  6. Type convert gpt.
  7. Now reboot the system with the DVD/USB, and you will see only Unallocated Space. Use that to install the new windows.
Yes, convert gpt is only a option, can be miss out.

Quote:
Be warned though, this will clear out the partition table on the drive; make sure you have a backup before attempting this if you have important data.
Yes, always backup.


My System SpecsSystem Spec
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 Error related to EFI system..unable to install windows 7 64-bit




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