Can't create a Database on Oracle 11g I'm new on Oracle and I'm trying to create a new database. I followed tutorials online but the problem seems to be in Windows and not in Oracle. 
I'm using the Oracle assistant to build my Database but when I arrive at the last stage and the assistant begin to configure all, there is an error (image attached).

From the message, seems that my user haven't the permission to read, write and execute anything from documents but it is not true. I gave full permission to my user and so I don't know why it stuck again here. 

My system configuration is: 
 - Oracle 11g ver. 2 
 - Windows 7 Pro (64bit)
In a command line, run:

attrib C:\Users\Pierpaolo\Documents


If you see a capital R in the output, then the read-only attribute is set for that folder (which is the default setting for the Documents folder).

Either remove the read-only attribute from the folder (I do not know what this will mess up in Windows), or specify a different folder for diagnostic dest.
For the latter, on this screen, go to All Initialization Parameters..., and set the value of diagnostic_dest to a directory that has no read-only attribute set.