EMET (Enhanced Mitigation Experience Toolkit) is a free Microsoft tool that provides additional security for applications like MS Office, Acrobat, Flash, and Java by enabling exploit mitigation techniques like ASLR, DEP, and SEHOP. While EMET strengthens security, it does not prevent all exploits and its management and deployment require planning. Questions about EMET and Microsoft's strategy are answered on their security blogs and technical library pages.