Install and use a firewall to prevent the blaster worm from infecting your system during the process of getting the updates/patches. You may use the build in one in XP. But I suggest you disable it after taking care of the blaster worm and get a decent one.

So basicly.

  1. boot the system

  2. put up the firewall

  3. remove the worm (and other things if they are there)

  4. reboot

  5. check if the system is really clean

  6. get ALL security patches/updates from http://windowsupdate.microsoft.com

  7. reboot

  8. Get a good firewall. (best is a router with build in one) but if you can’t afford that/don’t want that get ZoneAlarm or Kerio, but stay away from Kerio 4 since that one has some issues.

  9. disable the XP firewall

That should take care of it forgood.