it is protected, hidden, and read-only for a reason
It's < 8 GB, why not just leave it in case you want to return to the pre-installed OS?
the answer was in your 1st post ... sort of
If you're certain that you want to remove the partition....
diskpartHope that helps.
select the disk
select the partition
delete partition override
OT: spent a few weeks in the hospital, then a few more in rehab. I won't be posting much until I'm more recovered. Focusing and typing are very difficult. I suspect the stroke was bound to happen after the neurosurgeon cut my brain in half 20 years ago to remove a mass. Old age sucks - the alternative is worse though.