Unable to open msconfig in XP Professional

When I run msconfig in WindowsXP-Sp2 Professional nothing happens. Regedit and other functions work OK and the problem seems to be confined to msconfig. I would appreciate any guidance on how to correct this.

Hijackthis log is as follows:

Logfile of HijackThis v1.99.1
Scan saved at 10:28:10, on 17/10/2006
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

Running processes:
E:\WINDOWS\System32\smss.exe
E:\WINDOWS\system32\winlogon.exe
E:\WINDOWS\system32\services.exe
E:\WINDOWS\system32\lsass.exe
E:\WINDOWS\system32\Ati2evxx.exe
E:\WINDOWS\system32\svchost.exe
E:\Program Files\Windows Defender\MsMpEng.exe
E:\WINDOWS\System32\svchost.exe
E:\WINDOWS\system32\spoolsv.exe
E:\Program Files\Adobe\Photoshop Elements 3.0\PhotoshopElementsFileAgent.exe
E:\Program Files\Common Files\Microsoft Shared\VS7DEBUG\MDM.EXE
E:\Program Files\Adobe\Photoshop Elements 3.0\PhotoshopElementsDeviceConnect.exe
E:\WINDOWS\System32\svchost.exe
E:\Program Files\PCSecurityShield\ShieldAntivirus\vrmonsvc.exe
E:\WINDOWS\system32\Ati2evxx.exe
E:\WINDOWS\Explorer.EXE
E:\Program Files\Thomson\SpeedTouch USB\Dragdiag.exe
E:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_S4I0F2.EXE
E:\WINDOWS\Mixer.exe
E:\Program Files\Windows Defender\MSASCui.exe
E:\Program Files\QuickTime\qttask.exe
E:\Program Files\PCSecurityShield\ShieldAntivirus\vrmonnt.exe
E:\Program Files\PCSecurityShield\ShieldAntivirus\Vrres.exe
E:\Program Files\PCSecurityShield\The Shield Firewall\FireWall.exe
E:\Program Files\Messenger\msmsgs.exe
E:\WINDOWS\system32\ctfmon.exe
E:\Program Files\FreeCall.com\FreeCall\FreeCall.exe
E:\Program Files\Comodo\Comodo AntiSpam\CAS32.exe
E:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_S10MT2.EXE
E:\Downloads\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.co.uk/
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - E:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - E:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: Farstone Url Blocker - {316AEF8D-3C37-423E-9E6E-13820A9DC37A} - E:\PROGRA~1\PCSECU~1\THESHI~1\IrlOnIE.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - E:\Program Files\Spybot - Search & Destroy\SDHelper.dll
O2 - BHO: Farstone Popup Blocker - {E22F9B9D-1A1F-473E-BED6-D8BC152441F4} - E:\PROGRA~1\PCSECU~1\THESHI~1\FARPOP~1.DLL
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - E:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O4 - HKLM\..\Run: [SpeedTouch USB Diagnostics] "E:\Program Files\Thomson\SpeedTouch USB\Dragdiag.exe" /icon
O4 - HKLM\..\Run: [NeroFilterCheck] E:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [EPSON Stylus Photo R300 Series] E:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_S4I0F2.EXE /P30 "EPSON Stylus Photo R300 Series" /O6 "USB001" /M "Stylus Photo R300"
O4 - HKLM\..\Run: [C-Media Mixer] Mixer.exe /startup
O4 - HKLM\..\Run: [Windows Defender] "E:\Program Files\Windows Defender\MSASCui.exe" -hide
O4 - HKLM\..\Run: [QuickTime Task] "E:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [PinnacleDriverCheck] E:\WINDOWS\system32\PSDrvCheck.exe -CheckReg
O4 - HKLM\..\Run: [Vrmon] E:\Program Files\PCSecurityShield\ShieldAntivirus\vrmonnt.exe Main
O4 - HKLM\..\Run: [VrSchedule] E:\Program Files\PCSecurityShield\ShieldAntivirus\Vrres.exe
O4 - HKLM\..\Run: [dwStart] E:\Program Files\PCSecurityShield\The Shield Firewall\FireWall.exe
O4 - HKCU\..\Run: [MSMSGS] "E:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [ctfmon.exe] E:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [FreeCall] "E:\Program Files\FreeCall.com\FreeCall\FreeCall.exe" -nosplash -minimized
O4 - Startup: Adobe Gamma.lnk = E:\Program Files\Common Files\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Adobe Gamma Loader.lnk = E:\Program Files\Common Files\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Adobe Reader Speed Launch.lnk = E:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: Comodo AntiSpam.lnk = E:\Program Files\Comodo\Comodo AntiSpam\CAS32.exe
O8 - Extra context menu item: E&xport to Microsoft Excel - res://E:\PROGRA~1\MICROS~3\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - E:\PROGRA~1\MICROS~3\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - E:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - E:\Program Files\Messenger\msmsgs.exe
O10 - Unknown file in Winsock LSP: e:\windows\system32\caslsp.dll
O10 - Unknown file in Winsock LSP: e:\windows\system32\caslsp.dll
O10 - Unknown file in Winsock LSP: e:\windows\system32\caslsp.dll
O10 - Broken Internet access because of LSP provider 'farlsp.dll' missing
O16 - DPF: {30528230-99F7-4BB4-88D8-FA1D4F56A2AB} (YInstStarter Class) - http://us.dl1.yimg.com/download.yahoo.com/dl/installs/yinst20040510.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{0290791D-C4ED-44BB-A4B3-A99E7AE29E64}: NameServer = 212.74.114.129 212.74.112.66
O20 - Winlogon Notify: WgaLogon - E:\WINDOWS\SYSTEM32\WgaLogon.dll
O23 - Service: Adobe LM Service - Adobe Systems - E:\Program Files\Common Files\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: Adobe Active File Monitor (AdobeActiveFileMonitor) - Unknown owner - E:\Program Files\Adobe\Photoshop Elements 3.0\PhotoshopElementsFileAgent.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - E:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - E:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Photoshop Elements Device Connect (PhotoshopElementsDeviceConnect) - Unknown owner - E:\Program Files\Adobe\Photoshop Elements 3.0\PhotoshopElementsDeviceConnect.exe
O23 - Service: ViRobot Expert Monitoring (vrmonsvc) - HAURI - E:\Program Files\PCSecurityShield\ShieldAntivirus\vrmonsvc.exe