Well.. after scouring the folders, there are loads of options for link.exe you are right, of all of them this is the only one that seems to work for me :
"C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\bin\HostX86\x64\link.exe"
Which is Odd, as I'm entirely 64bit, you'd think the one in HostX64 would work!