I opened Kazaa and tried to play a music file. The Kazaa player would not play the file. So I opened the shared music file and tried to play it with Quicktime, which I have done before. When I tried, I got the "open with" that popped up so I clicked Quicktime. Now when I try to play the files it says "the file is not a valid Win32 application." And all of my files have an icon with an "A" beside them instead of the Quicktime icon. Does anyone knnow how I can fix this? Thank you!