There are a number of virus scanners that are reporting the false positives because of the paranoid way they view any program that needs to open disk ports or write files back to the application folder.  I am running MicroSoft Security Essentials and have not had any problems installing or using DAZ Studio.  MSE is free, doesn't hog a lot of resources and the database is updated frequently.  The only down side to it is actually downloading the updates, on dial-up it is nearly impossible.