hard drive - convert windows 7 to BIOS from EFI

  • Jeffrey

    So I got a new HDD, a larger one, and I want to transfer all my 7 stuff to that without having to reinstall. With doing my research I can do this by creating a system image. The only issue is my install is a EFI not BIOS so when I try to do the recovery off the new disk says I am unable to due to the bios. So is there any way to convert my install to BIOS from EFI. Or do I have to reinstall windows?


    I used a cloning software, still had the same issue. I imaged it straight off the windows 7 disc. As I stated earlier, it installed windows as a EFI, not BIOS controlled, so I was looking for a way to change it

  • Answers
  • Scandalist

    Sounds like cloning the drive could be a more effective approach.

  • Robert

    You have to make sure that you boot the cloning software from CD/Flashdrive in UEFI mode.

    Afterwards it may be necessary to perform a repair of the UEFI boot code using the Windows 7 installation CD.

  • Rod Smith

    A hard disk is neither EFI nor BIOS; those are types of firmware on the motherboard. Windows, however, ties its boot mode tightly to the partition table type: Windows can boot from an MBR disk only on a BIOS-based computer and from a GPT disk only on an EFI-based computer. Thus, I suspect that what's happened is that you've copied a GPT disk to use the MBR partition table. If you've already done the disk copying, you may be able to fix this by using my GPT fdisk (gdisk) utility; it can do a lossless MBR-to-GPT conversion. There is one major caveat, though: your disk copy must have copied all of the original disk's partitions, including its EFI System Partition (ESP). If the ESP hasn't been copied, then the new disk won't boot. On an EFI-based computer, though, you do not need to worry about copying or re-creating the boot sector code in the MBR or in the Windows partition(s).

    If your disk copy lacks the ESP or if you run into other problems, I recommend you start again but use some other disk-copying software. I'm not very familiar with Windows tools for this so I can't make any specific recommendations.

  • Related Question

    hard drive - Laptop not Booting into Anything (Windows 7)
  • Adnan

    I have an HP Pavilion dv4t that I bought last year. I recently upgraded to Windows 7.

    This problem just started a few hours ago. When thecomputer starts up and boots into Windows 7, I get a bluescreen which says "UNMOUNTABLE_BOOT_VOLUME". When I try to insert the HP Recovery Disc the Windows 7 disc, or boot into the recovery partition, none of them load up. (When I insert the Windows 7 disc, it stays stuck at the startup animation; when I insert the HP Recovery disc, it stays at a black screen with just the mouse cursor; when I boot into the recovery partition, the computer just restarts) So at this point, there is virtually nothing in my knowledge that I can do to fix this problem.

    Could there be something wrong with one of the laptop's components such as the hard drive or graphics card? The laptop does get fairly hot when I use it, could this have maybe fried the hard drive?

    What kind of solution is there to fix this problem? Thanks in advance for your help.

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  • Chris

    If you happen to have a live CD of sometype you might try loading that into the laptop and seeing if the computer can actually boot into anything at all. If that works, you might try to get into the BIOS of the laptop and see if anything changed there like the boot order or something to that effect.

    With the laptop being only a year or so old, getting a second harddrive is not that expenseive. It's quite possible that the drive did die on you so with a replacement you can always try again. In that same vain, you might see if the machine is still under warranty or if there is some type of recall on the machine.

    Hope this helps some, and good luck.