dhcpcsvc issue?

Hi group,

I have a home network physically described as follows: a DSL connection with
AT&T (their modem, Motorola 2210). Immediately downstream of the modem I
have a Belkin wireless router and hardwired to that I have a desktop
computer running Windows XP Pro with sp3 and all latest patches. Also
hardwired to the router is a Belkin USB hub to which I connect an HP 960c
printer and an Epson 1660 scanner. A laptop computer sometimes joins this
network via wireless.

The symptoms of the problem I'm having are that during the download of a
video from a web-site (e.g., ESPN) the desktop computer will suddenly
freeze. The system event log shows a dhcp 1002 error that occurs at about
the same time. I have had the desktop computer freeze like that when using
Skype but have not verified the dchp error message. The laptop (my wife's
work computer) has not exhibited any similar problems thus far.

I have Win IP config on the desktop and have attached a copy of the report
to this post. Also, I have configured the desktop NIC (has the latest
driver) as follows: VLAN tagging - disabled, auto disable PCIe - disabled,
auto disable PHY - disabled, checksum offload - disabled, flow control -
disabled, jumbo frame - disabled, large send offload - enabled, network
address - not present, shutdown wake-on-Lan - disabled, speed & duplex -
1Gbps full duplex, wake-on-Lan capabilities - pattern match & magic pack,
WOL & shutdown link speed - 10 Mbps first.

My question is this: why is the host requesting an IP address from the dhcp
server in the router when the lease it has on the present IP address has not
expired? Also, why doesn't the host handle the dhcpnak message properly?
Could it be that the host software dhcpcsvc.dll has been corrupted? If you
think so, how do I go about replacing it? Or, am I barking up the wrong tree
entirely?