/3/ - 3DCG

>>483801
Under Advanced Options, see if you are using Geometry Normals or Surface Normals.

IIRC Geometry Normals are typically used when baking from high-to-low if you've got hard edges on your mesh. Does your low poly mesh have any hard edges? As in, did you click on certain edges (like the edge of the desk) and use the "Harden Edge" tool at all? If so, I believe Geometry Normals is what you're looking for.

Pic semi-related; "smoothing groups" in Max are the same as hard/soft edges in Maya.