disable a memory slot¡¡¡¡¡

hey guys, i having problems with my laptop its a dell inspiron with 2 gs ram and my os is vista 32 bits, i m always getting a blue screen and after i ran a diagnosis it failed the memory test in slot A, is there any way to disable that single slot while i get a new memory set??

thankssss al lot in advance¡¡¡¡