The 100MB and 450MB partitions created by Win10 Setup

[mikeymikec]

Normally, if one were to boot from Win10 installation media AFTER installing Windows 10, should one or both of those partitions be readable from a command prompt?

From my Win7/8x experience I'd expect the 100MB partition to contain a 'boot' folder as AFAIK that's what Windows uses to begin the boot process, but I don't recall looking at a native Win10 system for this reason before and so I don't know what I should expect to see.

I'm trying to figure out why a Win10 system is saying 'inaccessible boot device' (I'm pretty sure the SSD is fine), but no matter what I've tried I haven't been able to read the 100MB boot partition (and I suspect that's the reason why it won't boot).

 

[Elixer]

If I assign a letter to those partitions, I can read it as well, so, that isn't the issue.

Is this a UEFI system?
Boot from a USB flash drive, then you can try "repair system" then troubleshoot, and pick the correct option, or you can drop down to a cmd prompt, and do bootrec /rebuildbcd, but I would try the "automatic" option first.

 

[mikeymikec]

UEFI, yup.

I tried the auto repair, nothing. The log file said that "a recently serviced boot binary is corrupt". No option to system restore. I did a full chkdsk on the Windows partition, I just did one on the 100MB partition (both fine), I ran through the bootrec commands but rebuildbcd and scanos detect no Windows installations.

 

[JackMDS]

100MB is the Boot partition, 450MB is the recovery.

In most case if you do not want/need recovery partition you can delete it.

Win 10 can install different initail partiton depnds on the type. Home vs. Pro. x86 vs x64, clean install vs Upgrade from Win 8 or 7.

 

[Elixer]

UEFI, yup.

I tried the auto repair, nothing. The log file said that "a recently serviced boot binary is corrupt". No option to system restore. I did a full chkdsk on the Windows partition, I just did one on the 100MB partition (both fine), I ran through the bootrec commands but rebuildbcd and scanos detect no Windows installations.

That usually means it is looking on the wrong drive for some reason? Do you have more than 1 drive?

 

[mikeymikec]

That usually means it is looking on the wrong drive for some reason? Do you have more than 1 drive?

Nope.

 

[Dahak]

You may need to a manunual repair of the bcd.

You can look here https://neosmart.net/wiki/fix-uefi-boot/ and go to the section called Fix UEFI Boot in Windows 8, 8.1, or 10

 

[vailr]

You haven't stated how the Win 10 installation was done: upgrade, fresh install?
I'd recommend a complete deletion of all existing partitions, then boot from the Windows installation media, and let the Windows installer create fresh partitions.

 

[mikeymikec]

fresh install.