System Disk and OS on Different partitions of the same drive

[carl_barrass]

Having issues tried asking in a few places and having trouble getting a consistent answer.

Basically it's an old dual boot system that i disabled the other boot on and now want to get rid of the partition for. Unfortunately it seems the boot stuff was installed to the deactivated OS's partition.

Image of the partitions, C is my win 8 install i want to keep. D is the old vista install i'm trying to get rid of but need to move the boot stuff from, (which is what marks it as a system disk AFAIK).

I did find this online for someone in win 7 with a similar issue, but i'm hesitant to try it on another version of windows obviously:

Spoiler

Just open an elvated command prompt and type:
bcdboot c:\windows/s c:

assuming that is suceesful, then type:

diskpart

sel vol c

act

sel vol z

inact

exi

close cmd prompt.

Done.

As an aside if at all possibble i'd like to avoid having to do a reinstall and whilst i'm sure it's in storage somwhere i don't currently have access to my Win 8 install disk, (got the licence key though). So solutions that avoid those are much preferred.

 

[carl_barrass]

Ok i can confirm the thing in spoiler tags does not work, came within a hairs breath of bricking my system, recovery disk could not fix things at all, fortunately i was able to use command prompt and diskpart to reset D as the active partition phew.

I'm still having heart palpitations.