Repeated Dhcp-Client error in log

I am getting the same error Dhcp client 1002 repeatedly in Event Viewer even
after 2 reinstalls of OS on 3 month old Vista Premium eMachine pc. It
doesn't seem to affect performance but I wonder if I could gain internet
connection speed by resolving it, or avoid future problems. Any idea?

Log Name: System
Source: Microsoft-Windows-Dhcp-Client
Date: 2/15/2008 9:16:35 PM
Event ID: 1002
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: Den-PC
Description:
The IP address lease 10.10.10.101 for the Network Card with network address
001BB9A522E0 has been denied by the DHCP server 10.10.10.1 (The DHCP Server
sent a DHCPNACK message).
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Dhcp-Client"
Guid="{15A7A4F8-0072-4EAB-ABAD-F98A4D666AED}" EventSourceName="Dhcp" />
<EventID Qualifiers="0">1002</EventID>
<Version>0</Version>
<Level>2</Level>
<Task>0</Task>
<Opcode>0</Opcode>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2008-02-16T05:16:35.000Z" />
<EventRecordID>22474</EventRecordID>
<Correlation />
<Execution ProcessID="0" ThreadID="0" />
<Channel>System</Channel>
<Computer>Den-PC</Computer>
<Security />
</System>
<EventData>
<Data>10.10.10.101</Data>
<Data>001BB9A522E0</Data>
<Data>10.10.10.1</Data>
</EventData>
</Event>