Do not put the Library in the Steam install folder, which is inside the Programs Files folder. I made a "C:\Games" folder, and put the Steam Library in that. Windows will not allow mods to take if you are in the Program Files (x86) folder.
I forgot to mention earlier, that my 2nd subsim game was "The Hunt For Red October" on the Commodore 64 machine... disk swaps were the rule of the day back then...
Is your laptop and Intel then, or an AMD?