Sentinel04,
I've had the same problem before. What I had to do was to go into the registry and remove all occurrences of Icewind Dale.
***WARNING***
Please backup your registry before editing it.
Click
here to learn how to backup your registry
Go to
start /
run / type
regedit / click
edit /
find / then type
Icewind and then click
ok. Once it finds an occurrence of icewind dale delete it and then hit the
F3 key to continue searching for more occurrences. Reboot your machine. Now, try to install your game.
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The Ramblings of Theoran