Compresses win32 modules (EXE, DLL, etc..) while leaving them fully functional.
BS Editor: PECompact is a next generation Windows executable compressor designed for software developers and vendors. Commonly termed an executable packer, such utilities compress executables and modules (i.e. *.EXE, *.DLL, *.OCX, *.SCR). At runtime the compressed modules are rapidly decompressed in memory.

Executable compressors work by compressing selected portions of executables. At runtime, compressed executables are decompressed and reconstructed directly into their virtual image (memory) so that no data is ever written to the disk. The executable can therefore be run exactly as it was before without the user even knowing it was compressed.

Compatibility:

*Complete Windows platform support (all variants, including Vista).
*Supports EXE, DLL, SCR, and all other Win32 PE formats except device drivers (SYS).
*Supports software and hardware DEP (Data Execution Prevention).
*Compressed executables can be matched to debug symbols by debuggers like Visual Studio. PECompact is unique in this proper handling of the debug directory.
*Supports VC++ 7 and 8 (Visual Studio 2003, 2005, 2008) CRT SEH protections; currently only win32 packer that properly addresses the issue. This is to say, if your C++ exception handling code doesnt work with other packers, it will with PECompact! you can free download PECompact (Student version) 3.02.2 now.