Thread:Project:Support desk/HTTP 500 problem when trying to access mediawiki/reply (10)

open_basedir is to set restrictions. If you set it, you're setting a restriction. I guess that a bit of research won't harm you.

Filesystem permissions are not file sharing permissions. Sharing a folder on the network won't make it writable to other people if the filesystem already imposes a permission restriction. Maybe you need to find a windows forum where people could explain you how to give permissions to the "everyone" group.