MY motherboard or my PSU? when i try to shut down the computer sometimes it just seems like it ignored my command, and sometimes all the programs at the bottom right corner of the screen closes but it wont shut down. and i have my fan at the back plugged in but its not turning, it was yesterday but now i look at it its not spinning.. someething tells me my psu isn't giving enough power? or my motherboard isnt functioning properly, but other then these things thers nothing else wrong. when i shut down now i usually have to go to "switch user" then shut down from there. my psu is antec truepower II 480w and im SURE its enough to power my computer cause my computer is like mid range not high end.. but i dunoo..anyone know how to fix this problem?