Here is a little troubleshooting for you.... After installing XP SP2, did you turn on IIS, you have to make sure IIS is not installed. Also, do you have a drive on your PC already named W:? Hmmm... you said you do not have permission to use SUBST, this can also be the problem..... If you do not have permission for it, it will not be able to make the drive... I will run a test on a test machine to see if it will work under a restricted user account...