Instead, users should use anti-virus and other security software to clean up their PC and deal with the virus.

BBC: Ransomware page

For its part, Microsoft has spent considerable time and energy tamping down security problems with its own products, from NT and other server software to its Internet Explorer browser.

CNN: Army Web site ditches NT for security reasons

He spent billions acquiring makers of security software, storage systems and other products, with an eye toward reinventing itself as a smaller International Business Machines Corp.

WSJ: Dell Nears $23 Billion Deal to Go Private