CPU 100% - Navapsvc.exe & iexplore.exe hogs

My CPU is running at or near 100% without typical "hogs" running. NAVAPSVC.EXE is the prime offender when it is running . . . 40 to 65% of the CPU. When I close NAVAPSVC.EXE, then IEXPLORE.EXE increases its use of the CPU to about the same levels. When I close IEXPLORE.EXE then other apps increase usage to a total of 70 to 80% of total CPU capacity.

Do I have a hijacker?

I have updated windows, installed Spywareblaster, SpywareGuard, Spybot Search & Destroy, Ad-aware, Google Toolbar, Zone Alarm and Trojan Remover. I have run all of the above that contain a component to search for and remove virus/hijackers/etc. I have also used Trend Micro's Housecall.

The problem remains. Here is my Hijack This log: (Because of its length this will require two posts)

PART ONE
Logfile of HijackThis v1.97.7
Scan saved at 9:57:52 AM, on 6/20/2004
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\Cisco Systems\VPN Client\cvpnd.exe
C:\WINDOWS\system32\LEXBCES.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\LEXPPS.EXE
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\System32\drivers\CDAC11BA.EXE
C:\Program Files\Common Files\Symantec Shared\ccEvtMgr.exe
C:\WINDOWS\System32\cisvc.exe
C:\PROGRA~1\Iomega\System32\ActivityDisk.exe
C:\Program Files\Common Files\Microsoft Shared\VS7Debug\mdm.exe
C:\Program Files\Norton AntiVirus\navapsvc.exe
C:\Program Files\Norton Internet Security\NISUM.EXE
C:\WINDOWS\System32\pctspk.exe
C:\Program Files\Iomega\DriveIcons\ImgIcon.exe
C:\Program Files\Common Files\Real\Update_OB\evntsvc.exe
C:\Program Files\QuickTime\qttask.exe
C:\WINDOWS\Mixer.exe
C:\Program Files\Support.com\bin\tgcmd.exe
C:\WINDOWS\System32\lxamsp32.exe
C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\printray.exe
C:\WINDOWS\System32\spool\drivers\w32x86\3\hpztsb04.exe
C:\Program Files\Common Files\Symantec Shared\ccApp.exe
C:\Program Files\Qurb\QSP-2.1.213.2\QOELoader.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\Password 2000\password.exe
C:\WINDOWS\System32\ctfmon.exe
C:\WINDOWS\System32\MsPMSPSv.exe
C:\Program Files\Norton Internet Security\ccPxySvc.exe
C:\Program Files\LexmarkX63\AcBtnMgr_X63.exe
C:\Program Files\LexmarkX63\ACMonitor_X63.exe
C:\Program Files\WinZip\WZQKPICK.EXE
C:\Program Files\1stClock\1stClock.exe
C:\Program Files\SpywareGuard\sgmain.exe
C:\WINDOWS\system32\ZoneLabs\vsmon.exe
C:\Program Files\SpywareGuard\sgbhp.exe
C:\WINDOWS\System32\taskmgr.exe
C:\WINDOWS\System32\cidaemon.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Documents and Settings\Kent Kofford\My Documents\HiJack This\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = URL
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = +s
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = URL
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer provided by Comcast High-Speed Internet
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.r4.attbi.com
O2 - BHO: (no name) - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {30A56549-9D5B-4D34-AFA7-440A7F0538A9} - C:\Program Files\Open Site\opnste.dll (file missing)
O2 - BHO: SpywareGuard Download Protection - {4A368E80-174F-4872-96B5-0B27DDD11DB2} - C:\Program Files\SpywareGuard\dlprotect.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: (no name) - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar2.dll
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Program Files\Norton AntiVirus\NavShExt.dll
O2 - BHO: (no name) - {EBCDDA60-2A68-11D3-8A43-0060083CFB9C} - C:\WINDOWS\System32\nzdd.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Program Files\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar2.dll
O4 - HKLM\..\Run: [CountrySelection] pctptt.exe
O4 - HKLM\..\Run: [Iomega Startup Options] C:\Program Files\Iomega\Common\ImgStart.exe
O4 - HKLM\..\Run: [Iomega Drive Icons] C:\Program Files\Iomega\DriveIcons\ImgIcon.exe
O4 - HKLM\..\Run: [TkBellExe] C:\Program Files\Common Files\Real\Update_OB\evntsvc.exe -osboot
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [C-Media Mixer] Mixer.exe /startup
O4 - HKLM\..\Run: [tgcmd] "C:\Program Files\Support.com\bin\tgcmd.exe" /server
O4 - HKLM\..\Run: [lxamsp32.exe] lxamsp32.exe
O4 - HKLM\..\Run: [PrinTray] C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\printray.exe
O4 - HKLM\..\Run: [HPDJ Taskbar Utility] C:\WINDOWS\System32\spool\drivers\w32x86\3\hpztsb04.exe
O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Common Files\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [ccRegVfy] "C:\Program Files\Common Files\Symantec Shared\ccRegVfy.exe"
O4 - HKLM\..\Run: [QOELOADER] "C:\Program Files\Qurb\QSP-2.1.213.2\QOELoader.exe"
O4 - HKLM\..\Run: [TrojanScanner] C:\Program Files\Trojan Remover\Trjscan.exe
O4 - HKLM\..\Run: [Zone Labs Client] "C:\Program Files\Zone Labs\ZoneAlarm\zlclient.exe"
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [Password2000] C:\Program Files\Password 2000\password.exe -w
O4 - HKCU\..\Run: [Popup Defender] "C:\Program Files\Popup Defender\pd.exe" Minimize
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\System32\ctfmon.exe
O4 - Startup: 1st Clock.lnk = C:\Program Files\1stClock\1stClock.exe
O4 - Startup: SpywareGuard.lnk = C:\Program Files\SpywareGuard\sgmain.exe
O4 - Global Startup: Billminder.lnk = C:\Program Files\QUICKENW\billmind.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE
O4 - Global Startup: WinZip Quick Pick.lnk = C:\Program Files\WinZip\WZQKPICK.EXE
O8 - Extra context menu item: &Google Search - res://c:\program files\google\GoogleToolbar2.dll/cmsearch.html
O8 - Extra context menu item: Backward &Links - res://c:\program files\google\GoogleToolbar2.dll/cmbacklinks.html
O8 - Extra context menu item: Cac&hed Snapshot of Page - res://c:\program files\google\GoogleToolbar2.dll/cmcache.html
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Si&milar Pages - res://c:\program files\google\GoogleToolbar2.dll/cmsimilar.html
O8 - Extra context menu item: Translate into English - res://c:\program files\google\GoogleToolbar2.dll/cmtrans.html
O8 - Extra context menu item: Translate Page - res://c:\windows\downloaded program files\GoogleToolbar_en_2.0.95-deleon.dll/cmtrans.html
O9 - Extra 'Tools' menuitem: Sun Java Console (HKLM)
O9 - Extra button: Real.com (HKLM)
O9 - Extra button: Messenger (HKLM)
O9 - Extra 'Tools' menuitem: Messenger (HKLM)
O14 - IERESET.INF: START_PAGE_URL=http://www.comcast.net
O15 - Trusted Zone: URL

PART TWO OF HJT LOG
O16 - DPF: {01113300-3E00-11D2-8470-0060089874ED} (Support.com Configuration Class) - URL
O16 - DPF: {166B1BCA-3F9C-11CF-8075-444553540000} (Shockwave ActiveX Control) - URL
O16 - DPF: {1DF36010-E276-11D4-A7C0-00C04F0453DD} (Stamps.com Secure Postal Account Registration) - URL
O16 - DPF: {26CBF141-7D0F-46E1-AA06-718958B6E4D2} - URL
O16 - DPF: {34805D32-AD89-469E-8503-A5666AEE4333} (RdxIE Class) - URL
O16 - DPF: {3E68E405-C6DE-49FF-83AE-41EE9F4C36CE} (Office Update Installation Engine) - URL
O16 - DPF: {41F17733-B041-4099-A042-B518BB6A408C} - URL
O16 - DPF: {56336BCB-3D8A-11D6-A00B-0050DA18DE71} - URL
O16 - DPF: {597C45C2-2D39-11D5-8D53-0050048383FE} (OPUCatalog Class) - URL
O16 - DPF: {6CB5E471-C305-11D3-99A8-000086395495} - URL
O16 - DPF: {74D05D43-3236-11D4-BDCD-00C04F9A3B61} (HouseCall Control) - URL
O16 - DPF: {9F1C11AA-197B-4942-BA54-47A8489BB47F} (Update Class) - URL
O16 - DPF: {BE5431D2-0F30-11D4-89D9-00C04F509C0A} (SDCInstaller Class) - URL
O16 - DPF: {C02226EB-A5D7-4B1F-BD7E-635E46C2288D} (Toontown Installer ActiveX Control) - URL
O16 - DPF: {C2FCEF52-ACE9-11D3-BEBD-00105AA9B6AE} (Symantec RuFSI Registry Information Class) - URL
O16 - DPF: {CE28D5D2-60CF-4C7D-9FE8-0F47A3308078} (ActiveDataInfo Class) - URL
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - URL
O16 - DPF: {E77C0D62-882A-456F-AD8F-7C6C9569B8C7} (ActiveDataObj Class) - URL
O16 - DPF: {EB387D2F-E27B-4D36-979E-847D1036C65D} (QDiagHUpdateObj Class) - URL