Just Re-Format and ReInstall... Just Like Windows.
Oh, err, umm, yeah, You know if you'd just use Windows, you'd know what to do in this case.
I hate having to explain everything.
(Yes, this was a cheeky response)
Non-Cheeky below:
D3Wd, teh 5uXx0Rz!
Let, us know how it goes.