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Windows 7: Cant Boot - Boot Selection Failed Because a Required Device Is Inacces

15 Jan 2017   #11
Papaya

Windows 10
 
 

Here is some info, if the hard drive has a Master Boot Record (MBR) partition style and if your computer has only one hard drive.

If the System Reserved partition exists
- System Reserved partition (System, Active, Primary Partition)
- Windows OS partition (Boot, Page File, Crash Dump, Primary Partition)

If the System Reserved partition does not exist
- Windows OS partition (System, Boot, Page File, Active, Crash Dump, Primary Partition)

This naming convention is confusing. The "System" partition on a Windows computer is where the files needed to "boot" the computer are located. It is normally the first partition on the first hard drive enumerated by the computer's BIOS. The "Boot" partition of a Windows computer can be located on any other hard drive and contains the files for the Windows operating system.

Cant Boot - Boot Selection Failed Because a Required Device Is Inacces-image.png

How to fix the Windows 10 bootloader if the hard drive has a Master Boot Record (MBR) partition style.
Look at post #24 in this thread: Solved How do I restore w10 bootloader? dual boot with ubuntu on separate hdd - Page 3 - Windows 10 Forums

How to use BCDBoot to add or repair the boot menu on a dual-boot PC.
Look at post #3 in this thread: Solved EasyBCD Dual Boot management for Win10 and Win7 on separate drives - Windows 10 Forums

(both of these instructions also work in Windows 7)




My System SpecsSystem Spec
.
16 Jan 2017   #12
Epicity

Windows 7 Home Premium 64bit
 
 

I installed Win 7 on it, got a larger SSD and installed win 7 on that was well. THen I plugged in the original SSD to boot it up, it actually worked. But it stopped working from then on.
My System SpecsSystem Spec
17 Jan 2017   #13
Epicity

Windows 7 Home Premium 64bit
 
 

So when using BCD, I assume I add a new windows boot entry. Do I added to the BOOT disk (I assume the system reserved) or the H disk?
My System SpecsSystem Spec
.

17 Jan 2017   #14
Papaya

Windows 10
 
 

Quote   Quote: Originally Posted by Epicity View Post
So when using BCD, I assume I add a new windows boot entry. Do I added to the BOOT disk (I assume the system reserved) or the H disk?
BCDBOOT <source>

<source> - Required. Specifies the location of the Windows directory to use as the source for copying boot-environment files.

The following example initializes the system partition by using BCD files from the D:\Windows folder:

bcdboot D:\Windows

Step 1:

How to make a backup copy of your BCD store (and how to restore them).

For example:
bcdedit /export c:\bcd.bak
bcdedit /import c:\bcd.bak

Step 2:

On the Windows 7 desktop, open a command prompt as administrator and type the following commands.

diskpart
list volume (note the volume letter of the Windows 7 that you want to add to the boot menu)
exit

bcdboot x:\windows (replace "x" with the Windows 7 volume letter that you want to add to the boot menu)

EDIT: If the volume letter is incorrect you will receive the following error message: Failure when attempting to copy boot files.
My System SpecsSystem Spec
18 Jan 2017   #15
Epicity

Windows 7 Home Premium 64bit
 
 

Ok I'm confused. I've got 2 harddrives with Win 7 plugged in, so specifying the source and backing up and restoring, I'm not too sure which one I'm supposed to copy into and from to.

Disk 1 - The C: Drive is the one that boots fine, is the one that I'm currently using.

Disk 0 - The H: and F: (System Reserved) is the stuffed one.

Am I backing up from C or H? Why am I exporting and re-importing into the same drive for Step 1?

In step 2, is the volume I want to add the boot menu the H or F?
My System SpecsSystem Spec
18 Jan 2017   #16
Papaya

Windows 10
 
 

Step 1:

It's highly recommended making a backup of your current BCD store in case something goes wrong.

How to make a backup copy of your current BCD store

bcdedit /export c:\bcd.bak

Step 2:

Select the volume letter that contains the Windows operating system, do not select the System Reserved partition.

On the Windows 7 desktop, open a command prompt as administrator and type the following commands.

diskpart
list volume (note the volume letter of the Windows 7 that you want to add to the boot menu)
exit

bcdboot x:\windows (replace "x" with the Windows 7 volume letter that you want to add to the boot menu)

edit: Now you should see two Windows 7 entries on the dual-boot screen.

Step 3: If something goes wrong

How to restore of your BCD store

bcdedit /import c:\bcd.bak
My System SpecsSystem Spec
20 Jan 2017   #17
Epicity

Windows 7 Home Premium 64bit
 
 

Awesome, it worked. Thanks
My System SpecsSystem Spec
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