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 ...
preliminary. coming before or leading up to the main action, discussion, business, etc.; introductory; prefatory; preparatory. ; from French preliminaire prÃ©liminaire Or Modern latin; praeliminaris From Classical latin- (prae see-) + Pre Classical latin, liminaris of a; threshold from, limen (threshold see). limen