I bought the set of 3 games, Kings Quest 4-6, and 5-6 work fine. But when I open IV, all I get is a black screen with a few splotches of gold or yellow. NO sound, nothing! It doesn't work.

How have other people fixed this?

Have you contacted support?

Also, can you tell us a bit more about your system configuration, that might help people diagnose your issue.

Haven't contacted support yet.

I run an AMD 64-dual core 3800+, 939 socekt, 4gb ram, windows 7-32-bit, radeon hd4800.