I have run into the same problem with where the NXT toolkit will not load in Vista. I have Lab View 8.5 here at work running on XP Pro and the NXT toolkit ran and complied no problem. i will try the administrator fix at home and see if i get the same result. i was actually thinking of partitioning the drive and putting XP on the new partition as a temp fix till lab view makes a new patch. But the adminstrator fix seems far more simpler, i will let you know.