BI Computer Setup Help

Good afternoon, hope all is well. I will apologize up-front for the long post. As shown with my recent drive issues (Drive Overallocation Issues), I have come to the conclusion that I need to perform a fresh install of Windows onto my BI-dedicated PC. Still cannot figure out why my C-drive is filled up completely; either a bad drive or driver as mentioned in the posts.

I know...

BI Computer Setup Help