My partners daughter will just click on anything ( only 23 ) and infected a rebuilt clean XP setup with what symantec call W32.Serflog.A.
Try to stop it on the pc and the worm stops anything it sees as a threat. See
E:\Software\Tools\AV Tools\Symantec Security Response - W32_Serflog_A.htm
The removal tool must be downloaded to another pc. It's small enough to use a floppy. You can transfer it to the infected pc and run it. It cleaned up the pc in question in one go, nice one symantec.