My hubbie says that you are well above the system requirements for ZBrush. It should be running. He is scratching your head and thinking about it right now. I have a question though. Are your running at 1024x768 resolution? I think ZBrush's interface has to be at 1024 to display correctly. (You may know this and tried it already...but I hadda ask to be sure.) My husband isn't sure he could solve it without sitting at your computer. :o( But we can try for awhile. LOL! I need an upgrade myself. I still have just a 10GB Harddrive. I constantly have to burn things onto CD just to keep some space. LOL! Like your Texture Tools I just bought and downloaded...going to have to burn them to CD. 11 MB at 56K....whew...it took awhile. LOL!