So I'm having a relatively new problem with DosBox and I don't know where to look for the problem's source. I'm running Windows 7 SP1 for reference.

I go through the mounting process just fine, I verify the directory is mounted correctly by running dir and it shows everything, then I go to the mount letter as per usual.

Previously, when I did something like "setup.exe" or "install.exe" from the mounted letter it would execute it. I was able to run several games including Dark Reign and Crusader: No Regret.

But now, when I do that, it inserts "win" before the command and that blocks it from running due to being an illegal command.
For example

J:/

J:/setup.exe

J:/win SETUP.EXE

Illegal command: win not found.

Where is the "win" coming from, why is it automatically inserting it, and how do I make it stop?

I checked my config file for dosbox and couldn't find anything matching that specific command. Didn't find anything in the "intro" or "help" commands within dosbox itself. I have literally no idea what's going on.