hi, i am having this exact same problem; hijackthis reports:
Logfile of HijackThis v1.99.1
Scan saved at 6:31:14 PM, on 1/17/2007
Platform: Windows 2003 SP1 (WinNT 5.02.3790)
MSIE: Internet Explorer v6.00 SP1 (6.00.3790.1830)
Running processes:
C:\Program Files (x86)\DHCP Turbo\dhcpt.exe...