you can try this, but be careful, put in install DVD or USB media, when you get to the section to select drive and to format for an install, see if you can then delete that )bytes partition and format the drive there. But if not, then the USB is not usable except for what is on it now. check their website
you could also try and boot to usb installation, log on and then take over ownership of the drive as mentioned. But select admins, owner rights, users, everyone,
and then select full control for them all by double clicking each one>>advanced permissions apply ok apply ok, resart pc and boot to this os on now and try again or format with install dvd. usb in install progress.
I bet you can not even use it now.
hey try this, open the wintoflash program you used to install the OS with as if you were installing it on a new drive, and see if their program will reformat it.
that may be best chance to unlock the drive to format with their program only.