Submitted by spec-indiahttp://www.spec-india.com
Unfortunately, no code that is millions of lines long is perfect, and security holes will always exist. One of the best ways to protect yourself is to make sure your system has the most recent patch levels installed. Rarely does a virus or worm attack a brand new vulnerability; rather, they attack known vulnerabilities for which patches exist. Typically, people who discover vulnerabilities will report them to Microsoft, and a patch is created and released along with the announcement of the vulnerability.