Leaderboard

Thanks to you both for the prompt and detailed response.

You also opened a ticket for this. But to repeat what I said there, and echo what vapechiK said, This is perfectly normal, and expected. In all cases, here. the pool drive itself is fully virtual, but doesn't have any blocks/data on the drive. All of the data is "reverse proxied" to the underlying disks, and handled invisible. So CHKDSK won't work on the drive, and it does not appear in StableBit Scanner. And the size is normal, as Windows needs a size before that can be properly read, so the 2TB size is a placeholder.

Given you've already chosen not to keep personal data, at this point personally I'd do a bare metal install of Windows - that is using external install media (e.g. USB or DVD) and choosing to delete the existing OS partition entirely so it doesn't retain any system files/configuration at all from the previous install.