"multiple_irp_complete_requests" error, USB Contention??

XP Home, SP 2
HP a1123c Pavilion Desktop
HP psc 2410 Printer
Realtek RTL8101L NIC, onboard, ASUS Goldfish 3 motherboard
DLink DI-624 Super G wireless router
Motorola SB5120 modem
Cox Cable HSI, always on

Frequent interrupts in large file downloads and streaming music caused me to
go looking for problems with Cox Cable. Eventually, after buying a new modem
and doing lots of tests/consulting with Cox support staff, conclusion reached
that NIC on my motherboard may be a little screwed up. I downloaded and
installed the latest driver and that seemed to help.

Cox suggested workaround-hook up a Linksys USB-Ethernet adapter and bypass
NIC to see if it really is the problem. I did that and while the system was
running it seemed much better. BUT, within minutes of first installing the
adapter the blue screen crash showed up with the error message

"multiple_irp_complete_requests"

Memory dump proceeded, etc. Nothing I have been able to do has helped
including getting a self-powered USB hub. I hook up the adapter and after a
few minutes, crash.

I have the HP printer, one external HDD and my receiver for wireless mouse
and keyboard hooked up to the USB ports on the machine. There are six ports
so 3 are empty.

Some evidence exists for bad interaction with HP printer drivers giving this
error a few years ago. But that involved an old printer no longer supported.
It is clearly some kind of USB buss problem. But what? The USB drivers all
seem to be Microsoft standard stuff and Device Mgr says they are okay. Where
do I look to try to resolve this thing?

I can live with my Ethernet connection/NIC for a bit but it bothers me when
something that is supposed to be "straightforward" goes whacky. Cox tech
people say they have not seen this before with a USB-Ethernet adapter.

I am not a Windows "maven" I can follow instructions, etc. but I'm not very
skilled with the jargon of computing. So if you think you can help, please
keep it as simple as possible.

Some help would sure be appreciated. Thanks.
--
Thank you for your help,

Scholastica