Please look at this hijack please

PLEASE SUPPLY RELEVANT INFORMATION:
Operating System Version:
Problem Application Name & Version:
Problem Hardware Make & Model:
Error Messages:
[HR}

Logfile of HijackThis v1.99.1
Scan saved at 5:26:06 PM, on 6/28/2005
Platform: Windows 2000 SP4 (WinNT 5.00.2195)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
C:\WINNT\System32\smss.exe
C:\WINNT\system32\winlogon.exe
C:\WINNT\system32\services.exe
C:\WINNT\system32\lsass.exe
C:\WINNT\System32\Ati2evxx.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\system32\spoolsv.exe
C:\Program Files\NavNT\defwatch.exe
C:\WINNT\System32\svchost.exe
C:\Program Files\NavNT\rtvscan.exe
C:\WINNT\system32\regsvc.exe
C:\WINNT\system32\MSTask.exe
C:\WINNT\System32\WBEM\WinMgmt.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\system32\MsgSys.EXE
C:\WINNT\system32\rundll32.exe
C:\WINNT\Explorer.EXE
C:\Program Files\NETGEAR\WG311TSU\Utility\Gear311T.exe
C:\Program Files\NavNT\vptray.exe
C:\Program Files\Java\jre1.5.0_01\bin\jusched.exe
C:\WINNT\system32\LVCOMSX.EXE
C:\Program Files\Logitech\Video\LogiTray.exe
C:\WINNT\system32\RUNDLL32.exe
C:\Program Files\Cas\Client\casclient.exe
C:\Program Files\Logitech\Video\FxSvr2.exe
C:\Program Files\AIM\aim.exe
C:\WINNT\system32\RUNDLL32.EXE
C:\WINNT\system32\nsvsvc\nsvsvc.exe
C:\WINNT\system32\vidctrl\vidctrl.exe
C:\Documents and Settings\Administrator\Local Settings\Temp\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.yahoo.com/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.yahoo.com/?.home=msgr
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.yahoo.com/?.home=msgr
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O2 - BHO: Yahoo! Companion BHO - {02478D38-C3F9-4efb-9B51-7695ECA05670} - C:\PROGRA~1\Yahoo!\COMPAN~1\Installs\cpn\ycomp5_6_2_0.dll
O2 - BHO: CCHelper - {0CF0B8EE-6596-11D5-A98E-0003470BB48E} - C:\Program Files\Panicware\Pop-Up Stopper Basic\CCHelper.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\PROGRA~1\Yahoo!\COMPAN~1\Installs\cpn\ycomp5_6_2_0.dll
O3 - Toolbar: Pa&nicware Pop-Up Stopper Basic - {B1E741E7-1E77-40D4-9FD8-51949B9CCBD0} - C:\Program Files\Panicware\Pop-Up Stopper Basic\popuppro.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINNT\system32\msdxm.ocx
O4 - HKLM\..\Run: [Synchronization Manager] mobsync.exe /logon
O4 - HKLM\..\Run: [AS00_Gear311T] C:\Program Files\NETGEAR\WG311TSU\Utility\Gear311T.exe -hide
O4 - HKLM\..\Run: [vptray] C:\Program Files\NavNT\vptray.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0_01\bin\jusched.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [LVCOMSX] C:\WINNT\system32\LVCOMSX.EXE
O4 - HKLM\..\Run: [LogitechVideoRepair] C:\Program Files\Logitech\Video\ISStart.exe
O4 - HKLM\..\Run: [LogitechVideoTray] C:\Program Files\Logitech\Video\LogiTray.exe
O4 - HKLM\..\Run: [cfgmgr52] RunDLL32.EXE C:\WINNT\cfgmgr52.dll,DllRun
O4 - HKLM\..\Run: [AUNPS2] RUNDLL32 AUNPS2.DLL,_Run@16
O4 - HKLM\..\Run: [exp.exe] C:\WINNT\system32\exp.exe
O4 - HKLM\..\Run: [WinTask driver] C:\WINNT\system32\wintask.exe
O4 - HKLM\..\Run: [scain] C:\WINNT\TEMP\s030109.Stub.exe
O4 - HKLM\..\Run: [Nsv] C:\WINNT\system32\nsvsvc\nsvsvc.exe
O4 - HKLM\..\Run: [vidctrl] C:\WINNT\system32\vidctrl\vidctrl.exe
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [LogitechSoftwareUpdate] "C:\Program Files\Logitech\Video\ManifestEngine.exe" boot
O4 - HKCU\..\Run: [CAS Client] "C:\Program Files\Cas\Client\casclient.exe"
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office\OSA9.EXE
O9 - Extra button: AIM - {AC9E2541-2814-11d5-BC6D-00B0D0A1DE45} - C:\Program Files\AIM\aim.exe
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (YInstStarter Class) - C:\Program Files\Yahoo!\Common\yinsthelper.dll
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/MsnMessengerSetupDownloader.cab
O18 - Filter: text/html - {8293D547-38DD-4325-B35A-F1817EDFA5FC} - C:\Program Files\Cas\Client\casmf.dll
O20 - Winlogon Notify: WindowsUpdate - C:\WINNT\system32\MRRECR40.DLL
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINNT\System32\Ati2evxx.exe
O23 - Service: DefWatch - Symantec Corporation - C:\Program Files\NavNT\defwatch.exe
O23 - Service: Logical Disk Manager Administrative Service (dmadmin) - VERITAS Software Corp. - C:\WINNT\System32\dmadmin.exe
O23 - Service: Norton AntiVirus Client (Norton AntiVirus Server) - Symantec Corporation - C:\Program Files\NavNT\rtvscan.exe

I also keep getting a pop noise, even when I am not using my computer. My popup blocker catches them, and there are no programs running.

Thanks for the help