This makes the prefix look more like a real Windows installation, at the cost of some extra disk space. The actual PE binaries are copied into the Wine prefix instead of the fake DLL files.This helps various copy protection schemes that check that the on-disk and in-memory contents of system modules are identical. Most modules are built in PE format (Portable Executable, the Windows binary format) instead of ELF when the MinGW compiler is available.Version 5.0: Latest Developer build v5.7 PE modules: