Microsoft has published on their support site interesting article Virus scanning recommendations for Enterprise computers that are running currently supported versions of Windows. It applies to the systems that experience slow-downs or instability when using virus scanning software (whatever the vendor), and proposes a solution (temporary solution?) for the issue.
memcpy() Is Going to Be Banned article at InfoQ talks about dangers of memcpy (and other memory/string related functions). Microsoft has more in-depth explanations as well as the list of Security Development Lifecycle (SDL) Banned Function Calls at MSDN. Also available from Microsoft is banned.h header file that, once included, will produce warnings for all the banned functions. Alternatively one can use the /W4-C4996 compiler option.
“How Do I?” Videos for Security from MSDN site.