Two seperate computers suddenly started acting up? It's possible that they got hit with the "Blaster" worm that's been causing a lot of people trouble lately:
http://securityresponse.symantec.com...ster.worm.html
http://us.mcafee.com/virusInfo/defau...virus_k=100547
http://www.theinquirer.net/?article=10986
http://www.amdforums.com/forumdisplay.php?s=&forumid=6