If you’re infected by the Blaster worm, download and install the security update from Microsoft on this page.
Then click here to download Symantec’s removal tool. Save it to your desktop. Then go to Symantec’s explanation of the removal tool and follow its instructions without skipping any steps. If you need help, call me!
Make sure you get to Windows Update and install Critical Updates, and update your antivirus software, or it will just get you again!