Eureka!! Hope this might help you! quote The AV included in Norton SystemWorks 2002 generated blue screens (stops related to tcpip.sys), but I set up the rest of SystemWorks 2002, and then installed NAV 2001 with the SymEvent patch for Windows 2000 ( http://www.symantec.com/techsupp/files/symevnt/symevnt.html -- first one on list ) and now everything works fine. The only real difference with the two versions that I can see is that 2002 also checks outgoing e-mail as well as incoming. I had the exact same problems with RC1, RC2, and the "final" of XP. unquote If above not suitable try to use the winXP's default and go to Symantec's site, or finally install a fresh "final" NSW2002 from Elusive , for instance. Luck. akenaton@suissemail.ch ps: I'm also have a lot of doubts about WinXP