power surge on Hub Port

[devtcher5]

My computer is continuously showing the message on right of task bar that

Power Serge On Hub Port :-
A USB dibice has exceeded the power limits of its hub port
Assistence in solving problem click this message
And when I click on the message
a dialog box with warning appears showing that

A USB Device has malfunctioned and exceeded the power limits of its hub port. You should disconnect the device.

The location of the device is shown in bold type

USB Root Hub [8 Porst]
unused port
? Unknown USB device
unused port
[FONT='Times New Roman','serif'] ? Unknown USB device[/FONT]
[FONT='Times New Roman','serif'] unused port[/FONT]
[FONT='Times New Roman','serif'] unused port[/FONT]
[FONT='Times New Roman','serif'] unused port[/FONT]
[FONT='Times New Roman','serif'] unused port[/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif'][/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif'][/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif']Recommendation [/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif']to reenable the port, disconnect the hardware and click Reset. If you click Close, the port will no longer function[/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif'][/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif'][/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif'] Reset Close[/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif'][/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif'][/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif']Yet there is no USB device is connected it is continuously showing this message[/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif']by Reset Or Close[/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif'][/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif']I am having Compaq PC [/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif']P4 proccessor 2.67GHz[/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif']RAM 1GB DDR1[/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif']TFT Monitor [/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif']and no any other editional device connected[/FONT][/FONT]
[FONT='Times New Roman','serif'][FONT='Times New Roman','serif'][/FONT][/FONT]

[pimpom]

The power that can be safely drawn from a USB port is limited. You should post details of all USB devices connected to your computer. Also mention if you have a USB expansion hub.