Probleme mit "netnav.exe(file missing)

Crusader

HI!
Habe seit einiger Zeit Probleme mit meinem PC, er sit seit einiger Zeit sehr langsam.
Habe mir dann HijackThis heruntergeladen, um ihn ueberpruefen lassen, er fand einen schaedlichen Eintrag namens:
O23 - Service: NT Net Driver (NtNav) (NtNav) - Unknown owner - C:\WINDOWS\system32\netnav.exe (file missing)

Da ich diesen Eintrag aber nicht löschen konnte, hab ich mich erkundigt, doch bei Google fand ich nichts sinnvolles......

Hier meine Logfile:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 15:17:48, on 11.12.2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16544)
Boot mode: Normal

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\Ati2evxx.exe
C:\Programme\Lavasoft\Ad-Aware 2007\aawservice.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programme\Avira\AntiVir PersonalEdition Classic\avguard.exe
C:\PROGRA~1\0190WA~1\w0svc.exe
C:\Programme\Avira\AntiVir PersonalEdition Classic\sched.exe
C:\Programme\Google\Common\Google Updater\GoogleUpdaterService.exe
C:\WINDOWS\SYSTEM32\ZONELABS\vsmon.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\ctfmon.exe
C:\Programme\ATI Technologies\ATI.ACE\cli.exe
C:\Programme\Avira\AntiVir PersonalEdition Classic\avgnt.exe
C:\Programme\ICQLite\ICQLite.exe
C:\Programme\Zone Labs\ZoneAlarm\zlclient.exe
C:\Programme\Microsoft Hardware\Mouse\point32.exe
C:\WINDOWS\system32\wscntfy.exe
C:\Programme\VirusProtect 3.8\VirusProtect 3.8.exe
C:\Programme\Google\Google Updater\GoogleUpdater.exe
C:\Programme\NETGEAR\WG111v2\WG111v2.exe
C:\Programme\ATI Technologies\ATI.ACE\cli.exe
C:\Programme\ATI Technologies\ATI.ACE\cli.exe
C:\Programme\Internet Explorer\iexplore.exe
C:\WINDOWS\system32\svchost.exe
C:\Programme\HijackThis\Hijackthis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://w**.utanet.at/
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = h**p://google.icq.com/search/search_frame.php
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = h**p://google.icq.com
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://w**.google.at/webhp?sourceid=navclient&hl=de&ie=UTF-8
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = h**p://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = h**p://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = h**p://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = h**p://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer von LIWES* Kabelmedien GmbH
R3 - URLSearchHook: ICQ Toolbar - {855F3B16-6D32-4fe6-8A56-BBB695989046} - C:\Programme\ICQToolbar\toolbaru.dll
O2 - BHO: XTTBPos00 - {055FD26D-3A88-4e15-963D-DC8493744B1D} - C:\Programme\ICQToolbar\toolbaru.dll
O2 - BHO: Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programme\Gemeinsame Dateien\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programme\Java\jre1.6.0_02\bin\ssv.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\programme\google\googletoolbar1.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\programme\google\googletoolbar1.dll
O3 - Toolbar: ICQ Toolbar - {855F3B16-6D32-4fe6-8A56-BBB695989046} - C:\Programme\ICQToolbar\toolbaru.dll
O4 - HKLM\..\Run: [ATICCC] "C:\Programme\ATI Technologies\ATI.ACE\cli.exe" runtime -Delay
O4 - HKLM\..\Run: [avgnt] "C:\Programme\Avira\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKLM\..\Run: [ICQ Lite] "C:\Programme\ICQLite\ICQLite.exe" -minimize
O4 - HKLM\..\Run: [Zone Labs Client] C:\Programme\Zone Labs\ZoneAlarm\zlclient.exe
O4 - HKLM\..\Run: [POINTER] point32.exe
O4 - HKLM\..\Run: [VirusProtect 3.8] "C:\Programme\VirusProtect 3.8\VirusProtect 3.8.exe" /h
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'LOKALER DIENST')
O4 - HKUS\S-1-5-19\..\Run: [Microsoft Works Update Detection] C:\Programme\Microsoft Works\WkDetect.exe (User 'LOKALER DIENST')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'NETZWERKDIENST')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\Run: [Picasa Media Detector] C:\Programme\Picasa2\PicasaMediaDetector.exe (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe (User 'Default user')
O4 - HKUS\.DEFAULT\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'Default user')
O4 - Global Startup: Google Updater.lnk = C:\Programme\Google\Google Updater\GoogleUpdater.exe
O4 - Global Startup: NETGEAR WG111v2 Smart Wizard.lnk = C:\Programme\NETGEAR\WG111v2\WG111v2.exe
O8 - Extra context menu item: Nach Microsoft &Excel exportieren - res://C:\PROGRA~1\MICROS~4\Office10\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programme\Java\jre1.6.0_02\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Konsole - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programme\Java\jre1.6.0_02\bin\ssv.dll
O9 - Extra button: Recherche-Assistent - {9455301C-CF6B-11D3-A266-00C04F689C50} - C:\Programme\Gemeinsame Dateien\Microsoft Shared\Reference 2001\EROProj.dll
O9 - Extra button: ICQ Lite - {B863453A-26C3-4e1f-A54D-A2CD196348E9} - C:\Programme\ICQLite\ICQLite.exe
O9 - Extra 'Tools' menuitem: ICQ Lite - {B863453A-26C3-4e1f-A54D-A2CD196348E9} - C:\Programme\ICQLite\ICQLite.exe
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programme\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programme\Messenger\msmsgs.exe
O10 - Unknown file in Winsock LSP: c:\windows\system32\nwprovau.dll
O12 - Plugin for .spop: C:\Programme\Internet Explorer\Plugins\NPDocBox.dll
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - h**p://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {54823A9D-6BAE-11D5-B519-0050BA2413EB} (ChkDVDCtl Class) - http://w**.cyberlink.com/winxp/CheckDVD.cab
O23 - Service: 0190/0900 Warner Überwachungsdienst (0190_0900_Warner_MonitorService) - Mirko Böer - C:\PROGRA~1\0190WA~1\w0svc.exe
O23 - Service: Ad-Aware 2007 Service (aawservice) - Lavasoft AB - C:\Programme\Lavasoft\Ad-Aware 2007\aawservice.exe
O23 - Service: AntiVir PersonalEdition Classic Planer (AntiVirScheduler) - Avira GmbH - C:\Programme\Avira\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: AntiVir PersonalEdition Classic Guard (AntiVirService) - Avira GmbH - C:\Programme\Avira\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\SYSTEM32\ati2sgag.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Programme\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programme\Gemeinsame Dateien\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: NT Net Driver (NtNav) (NtNav) - Unknown owner - C:\WINDOWS\system32\netnav.exe (file missing)
O23 - Service: PC Tools Auxiliary Service (sdAuxService) - Unknown owner - C:\Programme\Spyware Doctor\svcntaux.exe (file missing)
O23 - Service: PC Tools Security Service (sdCoreService) - Unknown owner - C:\Programme\Spyware Doctor\swdsvc.exe (file missing)
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs, LLC - C:\WINDOWS\SYSTEM32\ZONELABS\vsmon.exe

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End of file - 8031 bytes

Danke im Voraus

Crusader