like marymurny say.. but, with another words...
The binary installation of Informix for Windows is not the same for Linux.
If you want to convert a a Informix database from Linux to Windows:
1) On Linux machine, export all data to flat file (text file) with dbexport or unload or HPL.
2) Get with IBM Support (if you have support) the binary of Informix instalation for Windows.
3) Install the Informix for Windows ,
4) Load the database with dbimport or load or HPL.
Need more details? read the manuals or pay a consultant ...