afd.sys(Backdoor.Tidserv.l!inf)

Norton internet security found this: afd.sys(Backdoor.Tidserv.l!inf)

It is unable to remove it and linked me to this page

http://securityresponse.symantec.com/security_response/writeup.jsp?docid=2009-120316-3836-99&tabid=3

 

I have tried running the scan in safe mode but norton crashes in an runtime error

whenever i press any of the tabs  in the scan window OR when it finds the: afd.sys(Backdoor.Tidserv.l!inf)

 

I am unsure of what do do next.

 

Im running Vista sp2.