USB Device Not Recognized

hello, i got help from this site before which saved my computer from infections. I just recently started having a problem with my usb ports, when i plug in my USB flash drive, MP3 player, digital camera, i get the same error message..."USB Device Not Recognized" It does not show up in "MY COMPUTER" folder. I've done a search and this sounds like a common problem but I haven't found a way to fix it, and it's a pretty major thing that i use nearly everyday. The odd thing is that my USB mouse and Printer both work just fine, but nothing else does?? any help is apprieciated thanks.

Go to Control Panel > System > Hardware tab > Device manager
Tell me if you have something with yellow ! marked in Universal Serial Bus.

You should uninstall that one, put your motherboard CD in DVD/CD Drive and Search on it for USB driver.

Last thing you can do, Device manager again > System > Delete ( Uninstall ) PC BUS , that'll reset all your hardware when you restart computer and searching for all of them again. Maybe this could help..