How to overcome blue screen errors

Over come blue Screen errors 

If we get the blue screen errors when we working with pc suddenly,then we have find errors in our hardware and software first we have check in the software drivers first in insall all the drivers including graphic drivers also and install all the drivers again problem will be sloved if it is getting again then we have go check in that ram,first dos based ram checking software will be avaliable in the internet download and write in CD in bottable,

then it will ask some permissions to check ram give then it will check ram  if it has any errors in the Ram then we have change the Ram,thee are the main cases blue screen will occur.