MAY 3, 2004 - Posted at 11:54 a.m. CDT
NEW YORK - An Internet worm is racing around the world today, snarling tens of thousands of computers and causing Web traffic to slow.
The so-called "Sasser" worm takes advantage of a known flaw in the Windows operating system.
Microsoft had announced the flaw recently, but many computer owners haven't applied the fix that the company released.
Experts say the worm is spreading quickly, especially after businesses reopened today, but it's still not as widespread as last summer's "Blaster" outbreak.
Finland's third-biggest bank closed 120 of its offices for a few hours today to update anti-virus programs as a precaution.