When my PC boots up it starts up normally enough with no problems, but it opens an Explorer window showing the contents of C:/Windows/System32.

I close the window and go on with what I need to do.

What is opening this window? To hopefully aid someone in telling me why this happens I am including my Hijack log:
Logfile of HijackThis v1.97.7
Scan saved at 12:00:48 PM, on 5/31/2004
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:\Program Files\Common Files\Symantec Shared\ccSetMgr.exe
C:\Program Files\Common Files\Symantec Shared\ccEvtMgr.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Intel\Modem Event Monitor\IntelMEM.exe
C:\Program Files\Creative\SBAudigy2\Surround Mixer\CTSysVol.exe
C:\Program Files\Creative\SBAudigy2\DVDAudio\CTDVDDet.EXE
C:\WINDOWS\System32\CTHELPER.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\StartupMonitor.exe
C:\WINDOWS\MXOaldr.exe
C:\Program Files\Dell\Support\Alert\bin\NotifyAlert.exe
F:\Program Files\Roxio\Easy Media Creator 7\Drag to Disc\DrgToDsc.exe
C:\WINDOWS\SM1BG.EXE
F:\Program Files\DU Meter\DUMeter.exe
C:\Program Files\MUSICMATCH\MUSICMATCH Jukebox\mmtask.exe
C:\Program Files\Common Files\Logitech\QCDriver3\LVCOMS.EXE
F:\Program Files\Logitech\MouseWare\system\em_exec.exe
F:\Program Files\Logitech\ImageStudio\LogiTray.exe
C:\Program Files\Common Files\Symantec Shared\ccApp.exe
C:\WINDOWS\System32\CTsvcCDA.exe
F:\Program Files\Executive Software\Diskeeper\DkService.exe
F:\Program Files\Norton SystemWorks\Password Manager\AcctMgr.exe
C:\Program Files\Common Files\Sonic\Update Manager\sgtray.exe
F:\Program Files\Zone Labs\ZoneAlarm\zlclient.exe
C:\WINDOWS\System32\ctfmon.exe
C:\WINDOWS\System32\GEARSec.exe
C:\Program Files\Common Files\Microsoft Shared\VS7DEBUG\MDM.EXE
F:\Program Files\Norton SystemWorks\Norton Antivirus\navapsvc.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BackWeb-8876480.exe
F:\PROGRA~1\NORTON~1\NORTON~2\NPROTECT.EXE
F:\Program Files\Adobe\Acrobat 5.0\Distillr\AcroTray.exe
F:\Program Files\Norton SystemWorks\Norton Antivirus\SAVScan.exe
F:\Program Files\Warecentral\PrintKey-Pro\PKey_Pro.exe
C:\Program Files\Rocket Software\RocketTime\RocketTime.exe
F:\PROGRA~1\NORTON~1\NORTON~2\SPEEDD~1\NOPDB.EXE
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Common Files\Symantec Shared\CCPD-LC\symlcsvc.exe
F:\Program Files\PowerQuest\Drive Image 7.0\Agent\PQV2iSvc.exe
C:\WINDOWS\SYSTEM32\ZoneLabs\vsmon.exe
C:\WINDOWS\System32\MsPMSPSv.exe
G:\My Documents\My Downloads\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://cgi.verizon.net/bookmarks/bm....5&bm=ho_search
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.thedaily.com/bikini.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.dell4me.com/myway
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.dell4me.com/myway
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.dell4me.com/myway
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer provided by Verizon Online
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,Shellnext = http://us.mcafee.com/apps/vso/en-us...ystempopup=true
O2 - BHO: (no name) - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - F:\Program Files\Adobe\Acrobat 5.0\Acrobat\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - F:\Program Files\Spybot - Search & Destroy\SDHelper.dll
O2 - BHO: (no name) - {549B5CA7-4A86-11D7-A4DF-000874180BB3} - (no file)
O2 - BHO: (no name) - {5CA3D70E-1895-11CF-8E15-001234567890} - C:\WINDOWS\system32\dla\tfswshx.dll
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - F:\Program Files\Norton SystemWorks\Norton Antivirus\NavShExt.dll
O2 - BHO: (no name) - {FDD3B846-8D59-4ffb-8758-209B6AD74ACC} - (no file)
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: (no name) - {BA52B914-B692-46c4-B683-905236F6F655} - (no file)
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - F:\Program Files\Norton SystemWorks\Norton Antivirus\NavShExt.dll
O4 - HKLM\..\Run: [ATIModeChange] Ati2mdxx.exe
O4 - HKLM\..\Run: [ATIPTA] C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [IntelMeM] C:\Program Files\Intel\Modem Event Monitor\IntelMEM.exe
O4 - HKLM\..\Run: [CTSysVol] C:\Program Files\Creative\SBAudigy2\Surround Mixer\CTSysVol.exe
O4 - HKLM\..\Run: [CTDVDDet] C:\Program Files\Creative\SBAudigy2\DVDAudio\CTDVDDet.EXE
O4 - HKLM\..\Run: [CTHelper] CTHELPER.EXE
O4 - HKLM\..\Run: [AsioReg] REGSVR32.EXE /S CTASIO.DLL
O4 - HKLM\..\Run: [UpdReg] C:\WINDOWS\UpdReg.EXE
O4 - HKLM\..\Run: [PCMService] "C:\Program Files\Dell\Media Experience\PCMService.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
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: [Run StartupMonitor] StartupMonitor.exe
O4 - HKLM\..\Run: [MXO Auto Loader] C:\WINDOWS\MXOaldr.exe
O4 - HKLM\..\Run: [RoxioDragToDisc] "F:\Program Files\Roxio\Easy Media Creator 7\Drag to Disc\DrgToDsc.exe"
O4 - HKLM\..\Run: [SM1BG] C:\WINDOWS\SM1BG.EXE
O4 - HKLM\..\Run: [DU Meter] F:\Program Files\DU Meter\DUMeter.exe
O4 - HKLM\..\Run: [mmtask] C:\Program Files\MUSICMATCH\MUSICMATCH Jukebox\mmtask.exe
O4 - HKLM\..\Run: [Logitech Utility] Logi_MwX.Exe
O4 - HKLM\..\Run: [LVCOMS] C:\Program Files\Common Files\Logitech\QCDriver3\LVCOMS.EXE
O4 - HKLM\..\Run: [LogitechGalleryRepair] F:\Program Files\Logitech\ImageStudio\ISStart.exe
O4 - HKLM\..\Run: [LogitechImageStudioTray] F:\Program Files\Logitech\ImageStudio\LogiTray.exe
O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Common Files\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [AcctMgr] F:\Program Files\Norton SystemWorks\Password Manager\AcctMgr.exe /startup
O4 - HKLM\..\Run: [UpdateManager] "C:\Program Files\Common Files\Sonic\Update Manager\sgtray.exe" /r
O4 - HKLM\..\Run: [Zone Labs Client] "f:\Program Files\Zone Labs\ZoneAlarm\zlclient.exe"
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [SB Audigy 2 Startup Menu] /L:ENG
O4 - HKCU\..\Run: [LDM] C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BackWeb-8876480.exe
O4 - Global Startup: Acrobat Assistant.lnk = F:\Program Files\Adobe\Acrobat 5.0\Distillr\AcroTray.exe
O4 - Global Startup: Logitech Desktop Messenger.lnk = C:\Program Files\Logitech\Desktop Messenger\8876480\Program\LDMConf.exe
O4 - Global Startup: Microsoft Office.lnk = F:\Program Files\Microsoft Office\Office10\OSA.EXE
O4 - Global Startup: PrintKey-Pro.lnk = F:\Program Files\Warecentral\PrintKey-Pro\PKey_Pro.exe
O4 - Global Startup: Rocket.Time.lnk = C:\Program Files\Rocket Software\RocketTime\RocketTime.exe
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~3\OFFICE11\EXCEL.EXE/3000
O9 - Extra 'Tools' menuitem: Sun Java Console (HKLM)
O9 - Extra button: Control Pad (HKLM)
O9 - Extra 'Tools' menuitem: Control Pad (HKLM)
O9 - Extra button: Research (HKLM)
O9 - Extra button: Real.com (HKLM)
O9 - Extra button: Messenger (HKLM)
O9 - Extra 'Tools' menuitem: Messenger (HKLM)
O12 - Plugin for .bcf: C:\Program Files\Internet Explorer\Plugins\NPBelv32.dll
O12 - Plugin for .spop: C:\Program Files\Internet Explorer\Plugins\NPDocBox.dll
O16 - DPF: {0E5F0222-96B9-11D3-8997-00104BD12D94} (PCPitstop Utility) - http://www.pcpitstop.com/pcpitstop/PCPitStop.CAB
O16 - DPF: {3E68E405-C6DE-49FF-83AE-41EE9F4C36CE} (Office Update Installation Engine) - http://office.microsoft.com/officeu...ontent/opuc.cab
O16 - DPF: {C2FCEF52-ACE9-11D3-BEBD-00105AA9B6AE} (Symantec RuFSI Registry Information Class) - http://security.symantec.com/sscv6/...n/bin/cabsa.cab
O16 - DPF: {C3DFA998-A486-11D4-AA25-00C04F72DAEB} (MSN Photo Upload Tool) - http://sc.groups.msn.com/controls/PhotoUC/MsnPUpld.cab
O16 - DPF: {CE28D5D2-60CF-4C7D-9FE8-0F47A3308078} (ActiveDataInfo Class) - https://www-secure.symantec.com/tec...ta/SymAData.cab
O16 - DPF: {D1E7CBDA-E60E-4970-A01C-37301EF7BF98} (Measurement Service Client v.3.4) - http://ccon.futuremark.com/global/msc34.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://download.macromedia.com/pub/...ash/swflash.cab
O16 - DPF: {E77C0D62-882A-456F-AD8F-7C6C9569B8C7} (ActiveDataObj Class) - https://www-secure.symantec.com/tec.../ActiveData.cab
O16 - DPF: {F54C1137-5E34-4B95-95A5-BA56D4D8D743} (Secure Delivery) - http://www.gamespot.com/KDX/kdx.cab
O16 - DPF: {FF452CFC-7056-4A5D-A327-1DFEC8EDC82A} (Upload Class) - http://www.neptune.com/features/upload/ms40upld.ocx

Thanks.........Mark