This worm spreads via the Internet by exploiting the LSASS vulnerability. Your Windows is not up to date and the worm keeps comming back.! This is very important !
: Update your Windows. Doing this will make your computer more secure. Please visit Windows Update (follow this link: http://www.windowsupdate.com)
to update Windows. Follow the instructions on the screen. You may have to visit more then once Windows Update to install all updates.
Not updating Windows will leave your computer vulnerable to malware and attacks.