I have a Macbook using Mac OS X 10.4.8 Sometimes when programs freeze i force quit and the window of the program leaves the screen but the program itself doesn't quit. When i try to open it, no windows show up and it doesn't appear on the top menu bar. When i try to force quit it again, it shows up there but when i force quit the program still won't quit !! This has happened to Finder, Safari, Microsoft Office, and iChat. Can someone help me please ?