Computer No Longer Boots

Run the following commands:

DiskPart
List disk
List volume
Exit
Notepad

Copy the output into Notepad and save it.

If at the cmd prompt you type
C:
Dir /w
What do you see

Please boot your computer with Windows Setup Media and from Windows Recovery Environment start the Command Prompt.

Please type below commands into Command Prompt and press Enter key.

Following commands will repair Master Boot Record (MBR), Boot Sector and BCD Store.

Code:

Bootrec /FixMbr

Bootrec  /FixBoot

Bootrec /scanos

Bootrec  /RebuildBcd

pepanee said:

C: (the UEFI drive)

FreeBooter said:

repair Master Boot Record (MBR)

I wonder whether UEFI has MBR.

Matthew Wai said:

I wonder whether UEFI has MBR.

GPT drives tend to include a “protective MBR.” This type of MBR says that the GPT drive has a single partition that extends across the entire drive. This protective MBR ensures the old tools won’t mistake the GPT drive for an unpartitioned drive and overwrite its GPT data with a new MBR. In other words, the protective MBR protects the GPT data from being overwritten.

Since the BCD store exists and lists a Windows installation, you'll first have to "remove" it manually and then try to rebuild it again.

At the Command Prompt, type below command as shown and then press Enter:

Code:

C:

At the Command Prompt, type below command as shown and then press Enter:

Code:

bcdedit /export C:\bcdbackup

The bcdedit command is used here to export the BCD store as a file: bcdbackup. There's no need to specify a file extension.

The command should return the following on screen:
The operation completed successfully.

Meaning the BCD export worked as expected.


At this point, you need to adjust several file attributes for the BCD store so you can manipulate it. At the prompt, execute the attrib commands exactly like this:

Code:

attrib c:\boot\bcd -h -r -s

What you just did with the attrib command was remove the hidden, read-only, and system attributes from the file bcd. Those attributes restricted the actions you could take on the file. Now that they're gone, you can manipulate the file more freely - specifically, rename it.

To rename the BCD store, execute the ren command as shown:

Code:

ren C:\boot\bcd   bcd.old

Now that the BCD store is renamed, you should now be able to successfully rebuild it.

Try rebuilding the BCD again by executing the following, followed by Enter:

Code:

bootrec /scanos
bootrec /rebuildbcd

Restart your computer after rebuilding the BCD store.

FreeBooter:
I’ve seen this tutorial online as well. Yet Thanks for also listing it to help out.
I ran into a problem on the second step: (bcdedit /export c:\bcdbackup)
Here’s my error:

“
The store export operation has failed.
The requested system device cannot be found.
“

Let me try to recall what “may” have messed up my Windows. I believe I may have used Partition Magic or something to accidentally “merge” my main Local Drive to one of the 500 mb partitions on that same SSD. I hope there’s a fix for that.

Do you have any other suggestions please? There are really important files on there that didn’t make it to my backup drives, and I don’t want to reinstall Windows on top of that previous Windows. That would erase the important docs. I want you to be my computer doc (doctor) to help me out with this.

Thanks so much for assisting me sir.

Which bcdedit commands were ran?
Which bcdboot commands were ran?
Which bootsect commands were ran?


Consider these options:

1) On a working computer create tools that can be used to backup files, test the drives, and troubleshoot

2) Find 3 or 4 flash drives that you can format (> or = 8 GB)

On a working computer create:

a) a new bootable windows 10 iso 1909:
https://www.microsoft.com/en-us/soft...load/windows10
Download Windows 10 ISO File
Download Windows 10 ISO File
Create Bootable USB Flash Drive to Install Windows 10
Create Bootable USB Flash Drive to Install Windows 10


b) bootable Ubuntu flash drive:
Create a bootable USB stick on Windows | Ubuntu tutorials
Create a bootable USB stick on Windows | Ubuntu

c) Kyhi boot rescue flash drive:
Toolkit Item: Kyhi’s Rescue Disk – Win10.Guru
Toolkit Item: Kyhi’s Rescue Disk – Win10.Guru

d) Macrium rescue media:
Macrium Software | Macrium Reflect Free
Creating rescue media - KnowledgeBase v7 - Macrium Reflect Knowledgebase - KnowledgeBase v7 - Macrium Reflect Knowledgebase
Fixing Windows boot problems - KnowledgeBase v7 - Macrium Reflect Knowledgebase - KnowledgeBase v7 - Macrium Reflect Knowledgebase


Other options to consider:
System Restore Windows 10
Reset Windows 10
Custom Install Windows 10
Clean Install Windows 10


For partition recovery:
a) Testdisk: https://www.cgsecurity.org/wiki/TestDisk
b) @jumanji may be available to make recommendations