Error code:1311, source file not found

Hi,
I am trying to install rhino right software but getting following error message when it goes half way:
“C:Docume~1userlocals~1temprar$Dl10.5063Rhino4_setup7.cab.
Verify whether that file exists and that can be accessed by you. Error code:1311, source file not found.”
I wish to request any one to help me with this.
