Hey there, Ghost_PC.
How did it come to the drive having a write protection in the first place? Did you had any issues with the HDD prior to this happening? Besides the DISKPART option, there's another one, which involves the registry editor, but I'd recommend that you
don't try it if you don't feel too confident in your computer skills, because if you mess something up, it could lead to a lot of problems with your system. However if you decide to give it a go, here's a link, which has this method described, along with a bunch of other options:
http://www.wikihow.com/Disable-Write-Protection
Hope that helps.
Boogieman_WD