usb ports not responsive

[david3p]

I have a farely new computer and ever since i got it the usb ports have been non responsive, my printer doesn't work, my ipod doesn't work, but my usb key works once in a blue moon and my mouse and keyboard work but thats it. Is there anything i can do or ne1 i can call, thank you. (It is a custom made computer so there is no tech support number i can call)