Generic USB on Windows Vista Home Basic

Windows Vista Home Basic
5 port USB 2.0
Compaq Presario F500 Laptop

Have recently purchased a 4 port usb and I have noticed that It works for a
while then stops working, it seems to disconect or enter a power save state
and I have to disconect it to start it again.

Have tested other devices on the port and they work. As far as I can tell I
have power going through the device but they seem to turn off.

Any Ideas

Go into the device manager and look under universal serial bus
controllers and go through the usb root hub and look for the device in
the power tab then when you find it go to the power management tab and
uncheck allow computer to turn of this device to save power.

> Windows Vista Home Basic
> 5 port USB 2.0
> Compaq Presario F500 Laptop
>
> Have recently purchased a 4 port usb and I have noticed that It works
> for a
> while then stops working, it seems to disconect or enter a power save
> state
> and I have to disconect it to start it again.
>
> Have tested other devices on the port and they work. As far as I can
> tell I
> have power going through the device but they seem to turn off.
>
> Any Ideas