Both have worked fine for me under Windows Vista Ultimate. I did give the exe file admin privleges after getting a couple of weird errors. After that, everything has been working fine. I had to do the same for Yamp as it would bomb out after running. The AT&T voices that came on the original Kenwood install disc would not install. Not a big deal if you have the newer voices that you can purchase online (they sound better and do a better job of "getting" the pronunciations right anyways).