From Command Prompt type following commands:
1. Type diskpart and press Enter.
2. Type list volume and press Enter.
3. Note Volume 1 corresponding Volume number.
4. Now type select Volume=N and press Enter, where N is the Volume number you noted earlier in your case it was number 1.
5. Now type assign letter=w and press Enter.
6. Type exit and press Enter.
7. Type Dir /A /B W:\boot\bcd command and press Enter.
If Dir command founds BCD file at W: volume (partition) use the W: drive letter to replace C: drive letter to execute below commands:
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 prompt, execute the bcdedit command as shown and then press Enter:
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 command exactly like this:
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:
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:
Restart your computer after rebuilding the BCD store.
If the Dir command cannot found BCD file please let me know.