Microsoft is close to releasing a major update for its Windows XP operating system.

The goal is to plug holes that have led to massive security problems for computer users everywhere.

The company is expected to release the Windows XP Service Pack 2, in the coming days.

Microsoft had delayed the release to improve compatibility between the new security functions and other applications.

Among the changes, the new pack automatically turns on a firewall to better guard against attempts to infiltrate personal computers.

The update also fortifies protections on the Internet Explorer browser and offers tougher policing against e-mail-borne attacks.

As well, it provides a user with much more information about what programs are trying to contact the computer, and gives the user more chances to accept or decline.