Odd. I have win XP and this version of DAZ Studio and thus far have had no issues. I have a very similiar system to yours as well. I have a Athlon 2700 XP chip with a ATI 9700 Pro card. However, I have only been using this version of DAZ | Studio since last week. I did have a issue a couple weeks ago with a particular direct x sound driver. It stopped playing sound off CD's and mp3 files and such. A simple reboot seemed to get things working again. And I have yet to have a issue with that again.