A virulent computer worm that hobbled the global Internet took its toll Monday on stock trading in South Korea, the world’s most wired country. South Korea was hit hardest by the “SQL Slammer” worm, which forced firms worldwide to clean up computer systems after the virus spread through network connections, shutting Web servers at the weekend and slowing the Internet. Some Web servers in India and China were also badly affected. “It is a serious problem that people’s lives were disrupted,” South Korean President Kim Dae-jung said in a statement, adding that he had instructed ministries to act to prevent further virus attacks. Full Story