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Windows 7: EasyBCD 2.1.2 "broke" Bootloader and can't acess Win 7 (black screen)


26 Sep 2012   #1

Windows 7 Home Premium x64
 
 
EasyBCD 2.1.2 "broke" Bootloader and can't acess Win 7 (black screen)

Hi guys,
I've a ASUS N56VZ with Intel Core i7 - 3610QM, with Win 7 Home Premium x64 pre-installed. This computer come with EFI instead of the traditional BIOS.
When I bought it, I had 3 visible partitions. C (OS) - with windows and programs; D (Data) - in blank, I store some movies and other unimportant stuff; E (Recovery) - software from ASUS to recovery computer

So, as I'm at a Master's Degree in Computer Science, I needed to install Ubuntu. I made a partition from Win 7, reserving around 15 GB for Ubuntu 12.04.1.

It went fine, and the install was sucessful. I rebooted and I could get into Ubuntu. When I tried to enter Windows 7, I got this message:
"error: Invalid EFI file path.
Press any key to continue..."

So I get in Ubuntu again, and use repair-tool, which insert new entries on GRUB. Then, I got a new entry called "Windows UEFI loader". The old entry "Windows 7 (loader)" continued to not work. This new one, got me into Windows. And I should have stooped here.

But I though that this wasn't perfect, and installed EasyBCD 2.1.2 (actual version) on Windows. My idea was to replace GRUB by bootloader of Windows, and have the two entries there, for each OS.
The problem is that EasyBCD change my boot, and now I can't get into Windows anymore. I try to add those entries, but they do not have been sucessfull added.
Booting from windows, I have the Windows Boot Manager, with the two entries, but neither of them work. The Ubuntu retrieve a failure
"File: \NST\AutoNeoGrub0.mbr
Status: 0xc0000098"
The Windows 7 entry, get me into a black screen, and don't get into the windows loading bar...
If I boot from Ubuntu, I have the GNU GRUB, which still allow me to get into Ubuntu. The problem is that the entry "Windows UEFI loader" that used to work, now get me into the Windows Boot Manager, that I've just described.

So, I even try to use the Windows 7 DVD, to select "repair the computer" and then repair the boot, but I got always this message:
"his version of System Recovery Options is not compatible with the version of Windows you are trying to repair. Try using a recovery disc that is compatible with this version of Windows."

I tried the Wondershare LiveBoot 2012 software but that didn't solved too.

I've logged in Ubuntu and created this log with boot-repair, which I think can be of some help: Ubuntu Pastebin

Now I just want to be able to access Windows 7. I would prefer not to format and install Win 7 again, because I've a lot of programs installed and repeat that it's very time consuming, but if that's the only solution, that be. But I honestly think that I've used "every card" I knew to try to solve this..


ASUS N56VZ-S4036V
Specs:
Intel i7 3610QM
6GB (2GB+4GB) DDR3 1600
750GB 7200rpm SATA
Drive DVDRW Supermulti
15.6" FHD LED non glare
NVidia GeForce 650M 2G
Windows7 Premium 64 bits


My System SpecsSystem Spec
.

26 Sep 2012   #2
Microsoft MVP

 

It requires special installation steps to install to UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with - Windows 7 Forums. You'd need to ask in an Ubuntu forum how to install it in EFI mode.

You can remove EFI Boot disk from BIOS Boot order and enable Legacy BIOS to install normally, however.

For now I'd delete Ubuntu's partition, Mark Partition Active Windows 7 or it's 100mb System Reserved partition (preferred if you have it) then run Startup Repair - Run 3 Separate Times to start Windows 7 again.
My System SpecsSystem Spec
26 Sep 2012   #3

Windows 7 Home Premium x64
 
 

Thanks for your reply.

How can I remove EFI Boot disk from BIOS Boot order and enable Legacy BIOS?

Regarding your next step, as I can't boot into Windows, nor repair the computer through the Windows 7 installation disc, I can't mark Windows 7 partition as active...

So, can you explain step-by-step how to do those things?
My System SpecsSystem Spec
.


26 Sep 2012   #4
Microsoft MVP

 

Enter BIOS setup using the key given on first boot screen. Find the BIOS BOot order and remove EFI BOot disk, look for LEgacy BIOS setting to enable.

Fill in your System Specs in bottom left corner of post if you want more specfic help.

What happens when you boot into Startup Repair from DVD or Repair CD?
My System SpecsSystem Spec
26 Sep 2012   #5

Windows 7 Home Premium x64
 
 

I get into BIOS with F2. Then I don't have a "LEgacy BIOS setting", but I presume it is "Lauch PXE OpROM" - "Controls the execution of UEFI and Legacy PXE OpROM". It is by default disabled.

I dont' have a EFI BOot disk on boot order.
I just have:
"Windows Boot Manager PO:ST9750430AS)
ubuntu (PO:ST9750430AS)
ubuntu (PO:ST9750430AS)
P2: Slimtype DVD A DS8ASH"

When I boot up Windows 7 DVD or Repair CD I have the Windows logo and the loading bar, then appears the menu and I select "repair the computer" and then I got always this message:"This version of System Recovery Options is not compatible with the version of Windows you are trying to repair. Try using a recovery disc that is compatible with this version of Windows."

Edit: I forget to comment about Partition Wizard Bootable CD. I tried this, since it's the only way i could use to mark partition as Active. What happens is that the System (EFI System Partition) is marked as Active. Should be this to be active, or the C: partition (OS), where Windows 7 is installed?
If it's this second one, I can't turn it to active since that option is not available. The text is in grey instead of black, and it isn't clickable.
My System SpecsSystem Spec
26 Sep 2012   #6
Microsoft MVP

 

What I would do is go to the Asus Support Downloads webpage for your model to read the Manual, find out how to enable Legacy BIOS. It sounds like the Legacy setting you found. If you enable that and the Windows 7 HD, wipe it to clear the GPT formatting, then you may be able to install and repair normally.
My System SpecsSystem Spec
26 Sep 2012   #7

Windows 7 Home Premium x64
 
 

Thanks, I'll search for that legacy stuff on the manual.
But can you explain me what do you mean by enable the Windows 7 HD, and how to wipe it to clear the GPT formatting?
My System SpecsSystem Spec
26 Sep 2012   #8
Microsoft MVP

 

I suggested you enable the Legacy setting you found, set DVD to boot first, then target HD (unplug any others) then wipe the HD with Diskpart Clean Command so that installer can reformat it MBR instead of GPT disk used by EFI install.
My System SpecsSystem Spec
26 Sep 2012   #9

Windows 7 Home Premium x64
 
 

So we're talking about formatting everything to do a clean install...
No way we can overcome this without that extreme solution?

For me to use Diskpart Clean Command, I would need to be able to enter Windows, which I don't.. And you are saying to reformat my HD as MBR instead of GTP, right?
My System SpecsSystem Spec
26 Sep 2012   #10
Microsoft MVP

 

Diskpart Clean command wipes the entire HD to clear the boot sector and possible install problems. It is run from the Installer or Repair CD Command Line: DISKPART At PC Startup

If the BIOS is set to use Legacy BIOS then the Windows 7 installer should format the the HD MBR during install. But it needs to be wiped first to reset it from GPT format.

If you want to try to repair Windows 7 run Startup Repair - Run 3 Separate Times.

You should read your Manual to understand how EFI works with your BIOS better. It is different with every BIOS and very new cutting-edge technology just coming out widely. You may have messed it up beyond repair if you added GRUB bootloader and should inquire about EFI requirements in a Linux forum.

More resources:
http://www.burnedin.com/article/uefi...ed-bios-vs-efi
Installing Windows to an EFI-Based Computer
UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with - Windows 7 Forums
My System SpecsSystem Spec
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 EasyBCD 2.1.2 "broke" Bootloader and can't acess Win 7 (black screen)




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