Backdoor.tidserv!inf

I picked up this trojan yesterday and Nortons action was review and requires manual removal.  I am new at this and I do not know how to remove manually.  The location of the trojan is c:\documents and settings\owner\local settings\temp\tdss3671.tmp.  My Norton version is 15.0.0.58 and I am usind XP 2.  Can any one help me fix this problem.  I have tried scanning in safe mode but that did not work.