Windows flaw

Microsoft has warned about a serious flaw in all versions of its Windows software that could allow hackers to seize control of a person's computer when victims read emails or visit sites.

It assessed the problem's urgency as critical, its highest level, and urged customers to download a free repairing patch immediately from its site

The problem involves tricking Windows into processing unsafe code built into a web page or email message.

It was particularly unusual because it affected so many different versions of Windows, from Windows 98 to its latest Windows XP editions.