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The extension is currently supported only on the following configurations:

Windows OS:

• Windows XP SP3 with IIS 5.1 and » FastCGI Extension
• Windows Server 2003 with IIS 6.0 and » FastCGI Extension
• Windows Vista SP1 with IIS 7.0 and FastCGI Module
• Windows Server 2008 with IIS 7.0 and FastCGI Module
• Windows 7 with IIS 7.5 and FastCGI Module
• Windows Server 2008 R2 with IIS 7.5 and FastCGI Module

PHP:

• PHP 5.2.X, Non-thread-safe build
• PHP 5.3 X86, Non-thread-safe VC9 build

Note: The WinCache Extension can only be used when IIS is configured to run PHP via FastCGI.