you might want to run diskpart.exe as a admin
and see if your disk or partition has been marked as read only.
start cmd.exe as a admin
diskpart.exe
list disk
select disk 0 <----------- from the output of the previous command
attributes disk <-------- displays the attributes of that drive
see if it is marked as readonly
here is what mine shows:
DISKPART> attributes disk
Current Read-only State : No
Read-only : No
Boot Disk : No
Pagefile Disk : No
Hibernation File Disk : No
Crashdump Disk : No
Clustered Disk : No
if it is not marked readonly i would check the partition tables attrbutes
list volume
seclect volume 2 <-------- this is my windows drive
attributes volume <---------this will dump your volume info
here is what mine looks like:
DISKPART> attributes volume
Read-only : No
Hidden : No
No Default Drive Letter: No
Shadow Copy : No
again you are looking for it being marked as readonly.
if they are marked readonly you can clear the attribute
all else fails you can run repair commands to fix the boot record
with bootrec.exe
bootrec /fixmbr
bootrec.exe /fixboot
bootrec.exe /RebuildBcd
sorry if this seems complex, it is just a shame to have to wipe a drive for this problem