N/A Non-system processes like csc.exe originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that over time your registry suffers fragmentation and accumulates invalid entries which can affect your PC's performance.
But definitive most often refers specifically to a judgment or description that serves as a standard or reference point for others, as in the definitive decision of the court (which sets forth a final resolution of a judicial matter) or the definitive biography of Nelson (that is, the biography that sets the standard against which all other accounts ...
Reaching definition. In compiler theory, a reaching definition for a given instruction is an earlier instruction whose target variable can reach (be assigned to) the given one without an intervening assignment. For example, in the following code: d1: y:= 3 d2: x:= y d1 is a reaching definition for d2. In the following, example, however: d1 : y := 3 d2 : y := 4 d3 : x := y d1 is no longer a reaching definition for d3, because d2 kills its reach: the value defined in d1 is no longer available and cannot reach d3