windows xp - USB device not working properly on a Thinkpad T60

I have just started getting a message that a USB device is not working properly. This is on a new Thinkpad T60 running Windows XP Professional SP3.

I have had all devices attached for about 10 days or so.

When I go to Device Manager there is no sign of a problem: everything is working correctly.

I am unable to find out which device it is.

I searched Super User, but the only reference I found was to older computers which may not be USB 2.0 capable. This is not my problem.

EDIT: I realized I had a harddrive attached but turned off. Although I could not track down any error messages except the balloon that came up, I have disconnected it and, so far, no messages. We'll see over the next day or two, but this may be the problem.

EDIT 2: This has not solved the problem. I get the message that one of the USB devices has malfunctioned and it points to "USB root hub (2 ports)" and shows an unused port and an unknown device. However, when I check my device manager, it says that there are no problems, everything is working as it should?

EDIT: I now found the event log view and there are two types of error messages. They do not relate to the time that I get the balloon. Two of the three are "Ati2mtag" errors and the third is "System Control Manager". Are these related to my problem, and the balloon just pops up randomly?

EDIT: well, I'm still having the problem, and have narrowed it down to a malfunctioning device.

Answer

I took my computer to my local tech. He updates the drivers. He said that it was because, although I am using a powered hub, I have so many devices hooked up that the power it supplies is inadequate. All still seems to be working but I still occasionally get the message.

Thanks all.