Hi,
WampServer 2.5 includes, among others , Apache 2.4.9 and PHP 5.5.12 that are "compiled" with Visual C++ 2012, more commonly referred to as VC11.
The VC11 library will not run on Windows XP, even SP3 or Windows Server 2003, so the minimum system requirements to run WAMPServer 2.5 are: Windows 7 SP1 , Windows 8/8.1 , Windows Vista SP2 , Windows Server 2008 R2 SP1 , Windows Server
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