-----------------------------------------------------
NO SOUND
USE MOZILLA
----------------------------------------
blue screen of death fixer

right click c drive - then properties - then tools

If neither of these options work for you, seek out more potential solutions such as a system cleaning Reg cleaner like Regcure below.
----------------------------------------------------------

video driver -
go to dell drivers
its the first ati download under video for the 8400 - 25 megabytes

------------------------------------------------------

sound-
sound blaster live sb live download.
go to device manager do auto install

--------------------------------------------

download new windows media player

-------------------------------------------------------------

poleworx

has drivers folder may help