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Windows 7: No Boot Option, Just AHCI (Asus A450LC)

01 Sep 2014   #1

Windows 7 Ultimate x64
No Boot Option, Just AHCI (Asus A450LC)


I just installing Win7 Ultimate 64-bit for the first time in my Asus A450LC.

First problem is:
Error: Windows cannot be installed to Disk 0 Partition 1. (Show details)
Details: Windows cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GTP disks. Windows cannot be installed to this hard disk space. Windows must be installed to a partition formatted as NTFS.
Based on this : Windows cannot be installed to Disk 0 Partition 1
I delete both of the partition and continue installation without having problem.

But, when installation finished then laptop restarted it can't booting to windows.
So, i check bios and see that first booting is in my hard drive.
I try to restart again, but still can't booting to windows.

In some forums, it tells to check HDD Option, and if it AHCI change it to IDE.
When in Asus bios it can see in SATA mode selection, but i just find AHCI, no other option.

How can i change the type of SATA from AHCI to IDE?

What should i do? there is something that i could fix besides HDD setting?

My System SpecsSystem Spec
01 Sep 2014   #2

Windows 7 Pro x64 Windows 10 Pro x64

Disable EFI in the bios.

You can do it in Boot Options/Boot Order

There`s no need to change it from AHCI
My System SpecsSystem Spec
01 Sep 2014   #3

Windows 7 Ultimate x64

Hi AddRAM,

I've try it.
I go to boot option>>delete boot option(is to remove EFI) but there is new window that say "select one to delete". But it didn't show anything to choose.
I attached the picture.

Attached Thumbnails
No Boot Option, Just AHCI (Asus A450LC)-bios.jpg  
My System SpecsSystem Spec

01 Sep 2014   #4

Windows 7 Pro x64 Windows 10 Pro x64

Then go to boot order in the bios to disable EFI, it should be there.

If not then you`re gonna have to convert the hard drive to GPT.

Convert MBR Disk to GPT Disk

Option 2 Step #2
My System SpecsSystem Spec
01 Sep 2014   #5


You can also go ahead and try installing to UEFI since it is the future and offers certain benefits, so you know what it offers: UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with. You also were apparently doing so when you got the error, which requires that you delete all partitions so the installer can reformat them in GPT format.

If you want to Bypass UEFI to Install WIn7 then you'll need to find the correct settings in BIOS to enable Legacy, CSM or similar. Then you'd boot the installer as a non-UEFI device from the BIOS Boot order.

Changing listings in Boot Order isn't necessary since you'll only be choosing the device to boot there, which in the case of an EFI install means choosing the UEFI DVD drive or UEFI Flash stick to boot them to install to UEFI, deleting all partitions during the install.
My System SpecsSystem Spec
04 Sep 2014   #6

Windows 7 Ultimate x64

Hi, i still can't solve the problem.

I try to install win8.1 then windows can boot normally.

Huff, don't know what, every installing win7 it always can't boot to windows.

Or the probelm is in my win7 installer?
My System SpecsSystem Spec
04 Sep 2014   #7


If you are wanting to Bypass UEFI to Install WIn7 then you should be following those steps exactly. Did you even bother to click on the blue link to read them?
My System SpecsSystem Spec

 No Boot Option, Just AHCI (Asus A450LC)

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