So. I was pretty sure I had fixed the problem we had with compiling in Windows 10. Thing is I did it in a stopgap non-permanent way because we have to be done with it by the second week of February to support our subcontractor.
Turns out I had an older version of the framework we build on installed on my box and the newer version decided to fix their windows 10 compilation issues the right way. So we can't use our stopgap solution. So basically I look like an idiot and more important people than me have to work on the problem because I am not allowed to install anything on my box myself, our SA is already overwhelmed, and only the higher ups have the newest framework version. Good thing it's a long weekend and I have plenty of of beer and whiskey.