Slow startup, winlogon.exe, 99% CPU. Considering reinstall Window XP Pro.

Attached is a copy of the Hijack This log. After reading some of the postings here I am hoping that someone can help me before I take to drastic measures.
Also, I get after a few minutes of web browsing, a window that shows up in the bottom-middle of the screen. Most of the time it is only the outline of the window but now it's opaque (bright green). Has anyone else seen this?

Thanks in advance.
Mike

Logfile of HijackThis v1.97.7
Scan saved at 9:41:54 PM, on 6/15/2004
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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\rundll32.exe
C:\WINDOWS\System32\CTsvcCDA.exe
C:\Program Files\Norton AntiVirus\navapsvc.exe
C:\Program Files\Norton Internet Security\NISUM.EXE
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Norton Internet Security\SymProxySvc.exe
C:\Program Files\Norton Internet Security\NISSERV.EXE
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\System32\CTHELPER.EXE
C:\Program Files\HP\hpcoretech\hpcmpmgr.exe
C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\docume~1\michae~1.sei\locals~1\temp\34Kc.exe
C:\Program Files\HP\HP Software Update\HPWuSchd2.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\Program Files\AutoUpdate\AutoUpdate.exe
C:\PROGRA~1\NORTON~1\navapw32.exe
C:\Program Files\Norton Internet Security\IAMAPP.EXE
C:\WINDOWS\System32\bladdc.exe
C:\WINDOWS\System32\rintp.exe
C:\WINDOWS\System32\regu.exe
C:\Program Files\iM Networks\iM Radio Tuner\iM_Tray.exe
C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
C:\Program Files\Adobe\Acrobat 6.0\Distillr\acrotray.exe
C:\Program Files\Nikon\PictureProject\NkbMonitor.exe
C:\Program Files\Nikon\NkView6\NkvMon.exe
C:\Program Files\SpywareGuard\sgmain.exe
C:\Program Files\Norton Internet Security\ATRACK.EXE
C:\Program Files\SpywareGuard\sgbhp.exe
C:\WINDOWS\System32\HPZipm12.exe
C:\Program Files\HP\hpcoretech\comp\hpdarc.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\WINDOWS\System32\rundll32.exe
C:\hjt\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant = URL
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = about:blank
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
R3 - Default URLSearchHook is missing
F2 - REG:system.ini: UserInit=C:\WINDOWS\System32\Userinit.exe
O3 - Toolbar: Adobe PDF - {47833539-D0C5-4125-9FA8-0819E2EAAC93} - C:\Program Files\Adobe\Acrobat 6.0\Acrobat\AcroIEFavClient.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
O4 - HKLM\..\Run: [WINDVDPatch] CTHELPER.EXE
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [Image] rundll32 C:\WINDOWS\image.dll,Install
O4 - HKLM\..\Run: [HP Component Manager] "C:\Program Files\HP\hpcoretech\hpcmpmgr.exe"
O4 - HKLM\..\Run: [CTHelper] CTHELPER.EXE
O4 - HKLM\..\Run: [ATIPTA] C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [AsioReg] REGSVR32.EXE /S CTASIO.DLL
O4 - HKLM\..\Run: [34Kc] C:\docume~1\michae~1.sei\locals~1\temp\34Kc.exe
O4 - HKLM\..\Run: [HP Software Update] "C:\Program Files\HP\HP Software Update\HPWuSchd2.exe"
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [IMJPMIG8.1] C:\WINDOWS\IME\imjp8_1\IMJPMIG.EXE /Spoil /RemAdvDef /Migration32
O4 - HKLM\..\Run: [MSPY2002] C:\WINDOWS\System32\IME\PINTLGNT\ImScInst.exe /SYNC
O4 - HKLM\..\Run: [PHIME2002ASync] C:\WINDOWS\System32\IME\TINTLGNT\TINTSETP.EXE /SYNC
O4 - HKLM\..\Run: [PHIME2002A] C:\WINDOWS\System32\IME\TINTLGNT\TINTSETP.EXE /IMEName
O4 - HKLM\..\Run: [AutoUpdater] "C:\Program Files\AutoUpdate\AutoUpdate.exe"
O4 - HKLM\..\Run: [NAV Agent] C:\PROGRA~1\NORTON~1\navapw32.exe
O4 - HKLM\..\Run: [iamapp] C:\Program Files\Norton Internet Security\IAMAPP.EXE
O4 - HKLM\..\Run: [AutoLoaderp9rc1OblaJYP] "C:\WINDOWS\System32\basus.exe"
O4 - HKLM\..\Run: [pm8W34e] basus.exe
O4 - HKLM\..\Run: [rintp] C:\WINDOWS\System32\rintp.exe
O4 - HKLM\..\Run: [regu] C:\WINDOWS\System32\regu.exe
O4 - HKCU\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\System32\NVMCTRAY.DLL,NvTaskbarInit
O4 - HKCU\..\Run: [NVIEW] rundll32.exe nview.dll,nViewLoadHook
O4 - HKCU\..\Run: [YDr6RQKnl] bladdc.exe
O4 - HKCU\..\Run: [Symantec NetDriver Monitor] C:\PROGRA~1\Symantec\LIVEUP~1\SNDMon.EXE
O4 - Startup: PowerReg Scheduler.exe
O4 - Startup: SpywareGuard.lnk = C:\Program Files\SpywareGuard\sgmain.exe
O4 - Startup: Virtual Bouncer.lnk = C:\Program Files\VBouncer\VirtualBouncer.exe
O4 - Global Startup: PowerReg Scheduler.exe
O4 - Global Startup: iM StartCenter.lnk = C:\Program Files\iM Networks\iM Radio Tuner\iM_Tray.exe
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
O4 - Global Startup: Acrobat Assistant.lnk = C:\Program Files\Adobe\Acrobat 6.0\Distillr\acrotray.exe
O4 - Global Startup: NkbMonitor.exe.lnk = C:\Program Files\Nikon\PictureProject\NkbMonitor.exe
O4 - Global Startup: NkvMon.exe.lnk = C:\Program Files\Nikon\NkView6\NkvMon.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Restrictions present
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Research (HKLM)
O9 - Extra button: AIM (HKLM)
O9 - Extra button: Related (HKLM)
O9 - Extra 'Tools' menuitem: Show &Related Links (HKLM)
O10 - Unknown file in Winsock LSP: c:\windows\system32\inetadpt.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\inetadpt.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\inetadpt.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\inetadpt.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\inetadpt.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\inetadpt.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\inetadpt.dll
O12 - Plugin for .mov: C:\PROGRA~1\INTERN~1\PLUGINS\npqtplugin.dll
O12 - Plugin for .spop: C:\PROGRA~1\INTERN~1\Plugins\NPDocBox.dll
O12 - Plugin for .tiff: C:\Program Files\Internet Explorer\PLUGINS\npqtplugin3.dll
O16 - DPF: Win32 Classes -
O16 - DPF: {30528230-99F7-4BB4-88D8-FA1D4F56A2AB} (YInstStarter Class) - URL
O16 - DPF: {9F1C11AA-197B-4942-BA54-47A8489BB47F} (Update Class) - URL
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - URL
O16 - DPF: {FF65677A-8977-48CA-916A-DFF81B037DF3} (WMService Class) - URL