Thanks for your time Shawn!
Here's DM:
1. No, I didn't, everything is still on C:
2. Yes, I did. The page file is 5,627,904 KB, hopefully never used with 16 GB of RAM.
3. No, not on D:, only on C:
In addition to all that, I also moved C:'s FileHistory to D: - currently 1.52 GB.