How do I fix error 48 in iTunes when trying to restore my iPhone 4s?

Hi everyone, try this solution I found while searching the web:
Error -48:
This error occurs because iTunes is unable to write your library file to the iTunes folder. To fix it, simply locate the iTunes folder, right-click on the folder icon, and select 'Properties'. Then click on 'Advanced' and ensure that 'Fast Indexing' is disabled for the folder. Additionally, verify that 'Read-Only' is unchecked in the main properties dialog box.
source: http://appesorio.blogspot.pe/2013/05/itunes-vs-jailbreak-los-21-errores-que.html