
Index.php coming up blank? Admin works! With errors switched on in your php.ini you get stuff as in the subject?
It is (was for me) a permissions isssue! However not just from with in the deep of your IIS Management Consol but also and by far the easiest:
To set permissions find the folder with your Eplorer > Right Click > Properties > Security Tab
Internet Guest Account (HOME\IUSER_HOME) for one must be in the list and two must have the "Full Control" tick selected not just Read & Execute.
Go well!