Activator is a class in System namespace... This class is one of the most widely used class to create instances at runtime, of types locally or remotely defined... Usually it returns back an object or an objecthandle... There are lots of overloads of this method and in local scenarios mostly take System.Type() as one of the parameter... Its certain overloads also take typename as string and return back an object handle... This objecthandle then needs to be unwrapped to get back the object... The overload which returns objecthandle is mostly used in remoting...
CreateInstance is a static member of the class and so can be accessed directly without object creation...
PS: Abhishek, Microsoft India MVP lead has helped us get the below information:
Announcing Security Guidance Hands-On Labs Online
Microsoft Learning is pleased to announce the free, worldwide availability of Hands-On Labs 2811, Applying Microsoft Security Guidance, at http://www.microsoftelearning.com/security/.
This offering consists of four 90-minute labs that allow students to apply information and guidance to improve security in a network based on Microsoft Windows. These labs have been enormously successful at live events since their original release in April 2004, with over 12,000 deliveries through Certified Partners for Learning Solutions (CPLS). In addition, these labs have been offered at conferences and events worldwide, including TechEd US, TechEd Europe (highest-scoring labs).
Lab 1: Managing Security Updates
Lab 2: Implementing Server Security
Lab 3: Implementing Client Security for Windows 2000 and Windows XP
Lab 4: Implementing Application Security
Customers can now take these labs for free at home or in the office by registering at http://www.microsoftelearning.com/security/. The labs are conducted using real hardware in a safe online environment built on Microsoft Virtual Server technology. These are the first free hands-on labs online offered by Microsoft Learning and these will be followed by additional free labs on Windows XP Service Pack 2.