With Windows XP Service Pack 2 having been out for some time now, and Windows Vista on the horizon, Microsoft is announcing their end of support for the old Service Pack 1. Service Pack 2 was released in 2004, and most problems have been ironed out of it, so Microsoft sees no reason to continue support for SP1 which was released back in 2002.
"There's little reason for anyone to still be running SP1; SP2 contained a range of improvements to XP's security. People can check which version they are running by right-clicking on the My Computer desktop icon and then selecting properties.
The ending of support for SP1 will help Microsoft to clear the decks for the arrival of Vista, which is expected to be released to business customers next month and to consumers in January."