What's New and Improved in Apache 2.0 on Windows?. The ominous warnings for Windows users, such as, “Apache 1.3 is not yet optimized for performance …” and “not as stable or secure as the Unix version” are gone. Outside testing labs have found Apache 2.0's performance to be comparable to Microsoft's IIS product. And Apache 2.0 has finally arrived as a viable alternative to IIS on the Windows operating system. [PHP Everywhere]