Usb drivers. hi. for some reason my laptop wont detect my devices, such as my mp3. but if i go to

Question

hi. for some reason my laptop wont detect my devices, such as my mp3. but if i go to device manager and uninstall my mp3 and then search for hardware changes it will detect my mp3 and work fine for about 20 seconds. can you tell me the problem and how can i fix it.ok.Oh, i found this out . i put a different mp3 in my laptop and it dose the same thing. but if i put eather of the mp3's in my brothers laptop they work fine.and the funny thing is my usb and psp will be detected fine by my laptop.