Hi Robin,
I'm no expert, but I'd say that the first thing to do is check your php.ini file (under %system% - probably C:\windows - if it's not there try the php install directory (c:\php in most cases) failing that do a search.
If you don't need mysql ensure that all the "extension=" entries are commented out (semicolon in col 1). Alternatively, if you have the sql dll (watch out for "extension=php_mysql.dll" and extension=php_mysqli.dll" - MYSQL
I, you probably want the latter) make sure that the "extension_dir" actually points to where the mysql dll is (or, of course, move the dll to where the extension_dir points)
If none of that works, repost and we'll try something else
Ian
