When I download the malious software removal tool, does it automatically run
on my computer, or do I need to do something to make it happen?

The latest Windows XP patches--Microsoft security bulletin MS05-051--are
causing problems on some computers, (the patch could lock users out of their
PC, prevent the Windows Firewall from starting, block certain applications
from running or installing, and empty the network connections folder, among
other things.).

However, I didn't see XP Home addition listed in the systesm that may be
effected by this patch flaw. Can someone confirm this?