Erorr 1, always on top:
Strict Standards: Declaration of PageNavi_Options_Page::validate() should be compatible with scbAdminPage::validate($new_data, $old_data) in D:\xampp\htdocs\wordpress\wp-content\plugins\wp-pagenavi\admin.php on line 156
When is activated:
The plugin generated 255 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin.