WampServer

Copying PHP.INI from C:\Wamp\Apache2\Bin to C:\Windows temporarly fixes ths issue.
Forum: WampServer English

Try right clicking the phpopenchat folder in the web root (c:\wamp\www\phpopenchat(?)) and select properties. Uncheck the 'Read-only' checkbox, then click Apply. Choose 'apply changes to sub folders' and than OK. Then try editing your file.
Forum: WampServer English

This is the earliest post I can find that mentions a similar problem that I'm having, which is, failing to open a file using an include path of "c:\php5\pear", which is not the include path specified in PHP.INI. Here is an example of the failure which shows the incorrect path reference: Warning: require_once(System.php): failed to open stream: No such file or direct ory in C:\wamp\www
Forum: WampServer English