Not that person but I tried to do the secure cleaning mode where it zeros empty space but I think I was also downloading something at the same time. This was several years ago but I vaguely recall my system being unable to boot.
I haven't used it in a long time, but I know that it has two versions, one root and the other is regular (that's on Linux, not sure about Windows). Also don't check those boxes that say something like "slow" or something like that. That's just my experience. I'm pretty sure if you read up on it or watch a couple of YouTube videos you'll figure it out.