Huge performance increase I still do (probably with negligible effects) was to manually set the disk cache (or whatever it's called - ram using HDD) to a set amount (usually double the ram). Letting windows manage it meant it was constantly changing in size and moving around the drive and with spinning disks killed performance. Also made defragging often mkre necessary. And of course disabling system restore.

I still do it out of habit with SSDs and I imagine it's mostly unnecessary but never ran into issues. I figure at worst it may increase the life of the SSD