I have a VAIO: well known and documented problem. You can move "My Documents" to the "D" drive, (this will include I Tunes as it it should be in the "My Music" folder), - go to Microsoft Support; here's the link
How to Change the Default Location of the My Documents Folder
and you can also move the Swap File to the "D" drive; Control Panel/System/System Properties/Advanced/Performance/Settings/Advanced/Virtual Memory/Change and select which drive to put the Paging File, (do NOT do this to the Hibernate File).
Any future programs, install into D/Programs.
Hope this helps.