Help needed please...

  I am having a problem with my internet connection and I'm pretty sure it is virus/malware related.  I think someone is piggy-backing my connection to play Unreal Tournament 2004 as it's known to be a problem.  I have run adware, norton, & AVG and found a virus and about 30 spywares.  I also ran a hijackthis and posted the results below.  I want this person off my connection as I am paying alot of money to have a good connection for my gaming and this guy is making it run like junk with my ping going 2-5 times higher than it was for each of my games.

Logfile of HijackThis v1.97.7
Scan saved at 3:29:47 PM, on 4/30/2004
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Common Files\Symantec Shared\ccSetMgr.exe
C:\Program Files\Common Files\Symantec Shared\ccEvtMgr.exe
C:\WINDOWS\system32\spoolsv.exe
C:\PROGRA~1\Grisoft\AVG6\avgserv.exe
C:\WINDOWS\system32\cisvc.exe
C:\Norton\navapsvc.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\Norton\SAVScan.exe
C:\Program Files\Common Files\Symantec Shared\CCPD-LC\symlcsvc.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\Program Files\Dell\Media Experience\PCMService.exe
C:\Program Files\MUSICMATCH\MUSICMATCH Jukebox\mm_tray.exe
C:\Program Files\Common Files\Dell\EUSW\Support.exe
C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_S4I2C1.EXE
C:\WINDOWS\System32\RUNDLL32.EXE
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\Java\j2re1.4.2_04\bin\jusched.exe
C:\Program Files\Common Files\Symantec Shared\ccApp.exe
C:\Program Files\Messenger\MSMSGS.EXE
C:\WINDOWS\System32\ctfmon.exe
C:\PROGRA~1\Grisoft\AVG6\AVGCC32.EXE
C:\WINDOWS\system32\cidaemon.exe
C:\WINDOWS\system32\cidaemon.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Documents and Settings\Derek Lee\My Documents\HijackThis.exe

O2 - BHO: (no name) - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Norton\NavShExt.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Norton\NavShExt.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [PCMService] "C:\Program Files\Dell\Media Experience\PCMService.exe"
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [MMTray] C:\Program Files\MUSICMATCH\MUSICMATCH Jukebox\mm_tray.exe
O4 - HKLM\..\Run: [DwlClient] C:\Program Files\Common Files\Dell\EUSW\Support.exe
O4 - HKLM\..\Run: [EPSON Stylus C64 Series] C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_S4I2C1.EXE /P23 "EPSON Stylus C64 Series" /O6 "USB001" /M "Stylus C64"
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\System32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\j2re1.4.2_04\bin\jusched.exe
O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Common Files\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [AVG_CC] C:\PROGRA~1\Grisoft\AVG6\avgcc32.exe /STARTUP
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\MSMSGS.EXE" /background
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\System32\ctfmon.exe
O4 - Startup: PowerReg Scheduler V3.exe
O9 - Extra 'Tools' menuitem: Sun Java Console (HKLM)
O9 - Extra button: Messenger (HKLM)
O9 - Extra 'Tools' menuitem: Windows Messenger (HKLM)
O16 - DPF: {41F17733-B041-4099-A042-B518BB6A408C} - http://a1540.g.akamai.net/7/1540/52/20031216/qtinstall.info.apple.com/mickey/us/win/QuickTimeInstaller.exe
O16 - DPF: {9F1C11AA-197B-4942-BA54-47A8489BB47F} (Update Class) - http://v4.windowsupdate.microsoft.com/CAB/x86/unicode/iuctl.CAB?38049.8271990741
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab