So someone in my family just got a new computer, and all of the installed themes change the window borders/task bar, but mine doesn't. If I click on any theme other than and Aero theme then it reverts to the classic window border/task bar. Any help is appreciated. Thanks.
EDIT: I don't think I was completely clear, it will work on any premade Aero theme, but the "Installed Themes" don't work. The Aero troubleshooter says that the Desktop window manager is not running.