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Microsoft Update Aims to Secure PCs against Attack

A new Microsoft upgrade tries to make Windows XP more secure against attack. Service Pack 2 contains a program -- known as a firewall -- that keeps out some destructive computer worms. But the upgrade doesn't always work well with computers that already have firewalls installed. Hear NPR's Larry Abramson.

Copyright 2004 NPR

Larry Abramson is NPR's National Security Correspondent. He covers the Pentagon, as well as issues relating to the thousands of vets returning home from the wars in Afghanistan and Iraq.