Nspack is an executable compressor for Windows, which exceeds other similar products in features and compression ratio. Not only can it compress exe,dll, ocx, and scr files, but it can compress 64-bit executables, and executables created for the .net platform. When you compress files with archivers such as Zip or Rar, the files inside are not directly executable (they must first be decompressed before executing). Nspack, by contrast,works by compressing an executable file, yet still leaving it runnable without having to decompress it first. One other benefit of using Nspack is that your programs will be harder to crack or reverse-engineer. In order for your programs to be modified, the shell added by Nspack must first be removed, which is more difficult to do. NsPack features: 1,Support for 64-bit exe,dll,ocx and scr files. 2,encoding and compression of program code, data, and resources. 3,Support compressing .NET executable file. 4,Appealing Interface, efficient compression, and excellent compatibility. 5,decrease load times across networks, and download times from the internet . 6,Completely support recompressing the program compressed by commonly-used software such as Upx, Aspack, Pecompact, etc.. 7,Particular maximum compression makes program size smaller. 8,Support compressing a directory or multiple files directly. 9,integrates directly into Windows as a shell extension for ease of use. 10,completely transparent, self-contained operation with long filename support. 11,fast decompression routines deliver better performance than competing products. 12,Added compatibility compression function. 13,full Windows 95, Windows 98 ,Windows NT Windows XP,Windows 2003 Server and 64 bits Windows compatibility.