preciousj: It installed and loads, but after the title screen the mouse slows to a crawl and the game won't run. Tried messing with config and running as admin, neither fixes it. I bought and ran Planescape and BG earlier this week and those work with no problems at all. Also, selecting Windowed mode under Icewind's config doesn't put it into windowed mode.
Anyone else having problems or have suggestions on how to fix this?
You might try (if you are using nVidia or similiar card) to tweak 'nVidia control panel'. I bet you got installed newest drivers compounded with this shiny little toy. Right-click on desktop, choose 'nVidia control panel', choose 3D Settings, choose Advanced 3D Settings. There you can tweak how your driver control graphic card. You should check out 'Application Extensions' and TURN it ON (or vice versa if TURNED ON already). Such action helps with graphic and crashing issues with older applications like found on GOG.com (though they are modified to work on newer machines).
Also Menu Start Button -> Run -> DxDiag. Try various combinations here like same above (music & ddraw & direct3d acceleration), until you cross needed for.