The worm Downandup, Conficker, or Kido!, has affected 3.5 million computers with Windows operating systems according to various tech sites.
It targets the vulnerability in Microsoft’s server service which was patched in October 2008. It resets the System Restore point of the affected machine which means that administrators could not delete it.
The article at topnews.us notes that the worm shields itself by disabling Windows security, networking, and updating.
“The vulnerability is potentially wormable on older versions of Windows, XP and earlier; we’re encouraging customers to test and deploy the update as soon as possible,” said a security program manager at Microsoft.
Source: TOPNEWS

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Lee
Do you mean that I should delete…
Security Update for Windows XP (KB958644) installed on 24th Oct 2008
Does this mean the Oct Patch is the worms way in or the way to keep it out???
And Which Update are you talking about? Just the latest Windows XP and Server updates?
The October update is what prevents this worm from infecting your computer. If you run your windows updates you are protected. Those getting infected have not run their updates in months.