Moin Moin.
Wenn ich meine Kiste hochfahre, läuft der Explorer mit 99%-iger Auslastung. Nachdem ich den task beendet und wieder gestartet habe, läuft alles wieder "normal". Trotzdem kann da ja irgendwas nicht passen, oder?!
Hier mal der HiJack-Log:

Logfile of HijackThis v1.99.1
Scan saved at 18:21:12, on 02.03.2005
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:\Programme\Gemeinsame Dateien\Symantec Shared\ccProxy.exe
C:\Programme\Gemeinsame Dateien\Symantec Shared\ccSetMgr.exe
C:\Programme\Norton Personal Firewall\ISSVC.exe
C:\Programme\Gemeinsame Dateien\Symantec Shared\SNDSrvc.exe
C:\Programme\Gemeinsame Dateien\Symantec Shared\SPBBC\SPBBCSvc.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\Programme\Gemeinsame Dateien\Symantec Shared\ccEvtMgr.exe
C:\Programme\Gemeinsame Dateien\Symantec Shared\ccApp.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\Programme\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\WINDOWS\System32\ezSP_Px.exe
C:\Programme\Logitech\MouseWare\system\em_exec.exe
C:\WINDOWS\System32\RUNDLL32.exe
C:\Programme\T-DSL SpeedManager\SpeedMgr.exe
C:\Programme\Java\j2re1.4.2_03\bin\jusched.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programme\D-Tools\daemon.exe
C:\Programme\Gemeinsame Dateien\Real\Update_OB\realsched.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Programme\Gemeinsame Dateien\Microsoft Shared\VS7Debug\mdm.exe
C:\Programme\Norton AntiVirus\navapsvc.exe
C:\Programme\Norton AntiVirus\IWP\NPFMntor.exe
C:\Programme\Gemeinsame Dateien\Symantec Shared\CCPD-LC\symlcsvc.exe
C:\Programme\Gemeinsame Dateien\Ulead Systems\DVD\ULCDRSvr.exe
C:\Programme\T-DSL SpeedManager\tsmsvc.exe
C:\Programme\Gemeinsame Dateien\Symantec Shared\NMAIN.EXE
C:\WINDOWS\explorer.exe
C:\Programme\Qualcomm\Eudora\Eudora.exe
C:\Programme\Internet Explorer\iexplore.exe
C:\Programme\Gemeinsame Dateien\Symantec Shared\AdBlocking\NSMdtr.exe
C:\Programme\Internet Explorer\IEXPLORE.EXE
C:\Programme\Norton AntiVirus\OPScan.exe
C:\Programme\Norton Personal Firewall\ccEmFlSv.exe
C:\Programme\Messenger\msmsgs.exe
C:\Hausarzt\Neuer Ordner\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.de/
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programme\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: Norton Personal Firewall - {9ECB9560-04F9-4bbc-943D-298DDF1699E1} - C:\Programme\Gemeinsame Dateien\Symantec Shared\AdBlocking\NISShExt.dll
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Programme\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: Norton Personal Firewall - {0B53EAC3-8D69-4b9e-9B19-A37C9A5676A7} - C:\Programme\Gemeinsame Dateien\Symantec Shared\AdBlocking\NISShExt.dll
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Programme\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [ccApp] "C:\Programme\Gemeinsame Dateien\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [ATIPTA] C:\Programme\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [PinnacleDriverCheck] C:\WINDOWS\System32\PSDrvCheck.exe -CheckReg
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [Logitech Utility] Logi_MwX.Exe
O4 - HKLM\..\Run: [Trickler] "c:\dokumente und einstellungen\knorpel\lokale einstellungen\temp\~vis0001\fsg_4104.exe"
O4 - HKLM\..\Run: [ezShieldProtector for Px] C:\WINDOWS\System32\ezSP_Px.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programme\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [SSC_UserPrompt] C:\Programme\Gemeinsame Dateien\Symantec Shared\Security Center\UsrPrmpt.exe
O4 - HKLM\..\Run: [WildTangent CDA] RUNDLL32.exe "C:\Programme\WildTangent\Apps\CDA\cdaEngine0400.dll",cdaEngineMain
O4 - HKLM\..\Run: [T-DSL SpeedMgr] "C:\Programme\T-DSL SpeedManager\SpeedMgr.exe"
O4 - HKLM\..\Run: [Symantec NetDriver Monitor] C:\PROGRA~1\SYMNET~1\SNDMon.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programme\Java\j2re1.4.2_03\bin\jusched.exe
O4 - HKLM\..\Run: [DAEMON Tools-1033] "C:\Programme\D-Tools\daemon.exe" -lang 1033
O4 - HKLM\..\Run: [TkBellExe] "C:\Programme\Gemeinsame Dateien\Real\Update_OB\realsched.exe" -osboot
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - Global Startup: Logitech Desktop Messenger.lnk = C:\Programme\Logitech\Desktop Messenger\8876480\Program\LDMConf.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Programme\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: Nach Microsoft &Excel exportieren - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\WINDOWS\System32\msjava.dll
O9 - Extra 'Tools' menuitem: Sun Java Konsole - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\WINDOWS\System32\msjava.dll
O9 - Extra button: Recherchieren - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra button: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - C:\PROGRA~1\Yahoo!\MESSEN~1\YPager.exe
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - C:\PROGRA~1\Yahoo!\MESSEN~1\YPager.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programme\Messenger\MSMSGS.EXE
O9 - Extra 'Tools' menuitem: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programme\Messenger\MSMSGS.EXE
O16 - DPF: {2BC66F54-93A8-11D3-BEB6-00105AA9B6AE} (Symantec AntiVirus scanner) - http://security.symantec.com/sscv6/S...in/AvSniff.cab
O16 - DPF: {56336BCB-3D8A-11D6-A00B-0050DA18DE71} (RdxIE Class) - http://software-dl.real.com/18cefe6d...dxIE601_de.cab
O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) - http://security.symantec.com/sscv6/S.../bin/cabsa.cab
O16 - DPF: {EB387D2F-E27B-4D36-979E-847D1036C65D} (QDiagHUpdateObj Class) - http://h30043.www3.hp.com/hpdj/de/check/qdiagh.cab?326
O17 - HKLM\System\CCS\Services\Tcpip\..\{A1C51235-F647-4A6D-84C0-D8AE48D440A4}: NameServer = 217.237.149.161 217.237.151.225
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: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Programme\Gemeinsame Dateien\Symantec Shared\ccEvtMgr.exe
O23 - Service: Symantec Network Proxy (ccProxy) - Symantec Corporation - C:\Programme\Gemeinsame Dateien\Symantec Shared\ccProxy.exe
O23 - Service: Symantec Password Validation (ccPwdSvc) - Symantec Corporation - C:\Programme\Gemeinsame Dateien\Symantec Shared\ccPwdSvc.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Programme\Gemeinsame Dateien\Symantec Shared\ccSetMgr.exe
O23 - Service: ISSvc (ISSVC) - Symantec Corporation - C:\Programme\Norton Personal Firewall\ISSVC.exe
O23 - Service: Macromedia Licensing Service - Unknown owner - C:\Programme\Gemeinsame Dateien\Macromedia Shared\Service\Macromedia Licensing.exe
O23 - Service: Norton AntiVirus Auto-Protect-Dienst (navapsvc) - Symantec Corporation - C:\Programme\Norton AntiVirus\navapsvc.exe
O23 - Service: Norton AntiVirus Firewall Monitor Service (NPFMntor) - Symantec Corporation - C:\Programme\Norton AntiVirus\IWP\NPFMntor.exe
O23 - Service: SAP Internet Graphics Server (SAP IGS Service) - Unknown owner - C:\Programme\SAPpc\SapGui\srvany.exe (file missing)
O23 - Service: SAVScan - Symantec Corporation - C:\Programme\Norton AntiVirus\SAVScan.exe
O23 - Service: ScriptBlocking Service (SBService) - Symantec Corporation - C:\PROGRA~1\GEMEIN~1\SYMANT~1\SCRIPT~1\SBServ.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Programme\Gemeinsame Dateien\Symantec Shared\SNDSrvc.exe
O23 - Service: Symantec SPBBCSvc (SPBBCSvc) - Symantec Corporation - C:\Programme\Gemeinsame Dateien\Symantec Shared\SPBBC\SPBBCSvc.exe
O23 - Service: Symantec Core LC - Symantec Corporation - C:\Programme\Gemeinsame Dateien\Symantec Shared\CCPD-LC\symlcsvc.exe
O23 - Service: SymWMI Service (SymWSC) - Symantec Corporation - C:\Programme\Gemeinsame Dateien\Symantec Shared\Security Center\SymWSC.exe
O23 - Service: TSMService - T-Systems Nova, Berkom - C:\Programme\T-DSL SpeedManager\tsmsvc.exe
O23 - Service: Ulead Burning Helper (UleadBurningHelper) - Ulead Systems, Inc. - C:\Programme\Gemeinsame Dateien\Ulead Systems\DVD\ULCDRSvr.exe

@Hausarzt

Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Win XP SP2/IE SP2 fehlen.

O4 - HKLM\..\Run: [WildTangent CDA] RUNDLL32.exe "C:\Programme\WildTangent\Apps\CDA\cdaEngine0400.dll",cdaEngineMain

Fixen und hier lesen: http://www.iamnotageek.com/a/245-p1.php