Folgende Ergänzung:
Das ergab HijackThis...
Logfile of HijackThis v1.99.1
Scan saved at 20:41:14, on 27.02.2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16608)
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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\Programme\Cisco Systems\SSL VPN Client\agent.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programme\Avira\AntiVir PersonalEdition Classic\avguard.exe
C:\Programme\Avira\AntiVir PersonalEdition Classic\sched.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\RTHDCPL.EXE
C:\Programme\Java\jre1.6.0_03\bin\jusched.exe
C:\Programme\Gemeinsame Dateien\Real\Update_OB\realsched.exe
C:\Programme\Avira\AntiVir PersonalEdition Classic\avgnt.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\WINDOWS\system32\ctfmon.exe
C:\Programme\Messenger\msmsgs.exe
C:\WINDOWS\system32\svchost.exe
D:\Programme\Mozilla Firefox\firefox.exe
C:\Dokumente und Einstellungen\Thilo Werker\Desktop\hijackthis_199\HijackThis.exe
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page =
http://www.google.de/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL =
http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL =
http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page =
http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page =
http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext =
http://windowsupdate.microsoft.com/
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = 128.232.103.202:3127
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programme\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programme\Java\jre1.6.0_03\bin\ssv.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXE
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programme\Java\jre1.6.0_03\bin\jusched.exe
O4 - HKLM\..\Run: [QuickTime Task] D:\Programme\QuickTime\qttask.exe -atboottime
O4 - HKLM\..\Run: [TkBellExe] C:\Programme\Gemeinsame Dateien\Real\Update_OB\realsched.exe -osboot
O4 - HKLM\..\Run: [avgnt] C:\Programme\Avira\AntiVir PersonalEdition Classic\avgnt.exe /min
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Skype] D:\Programme\Skype\Phone\Skype.exe /nosplash /minimized
O4 - HKCU\..\Run: [MSMSGS] C:\Programme\Messenger\msmsgs.exe /background
O4 - HKCU\..\Run: [Steam] D:\Programme\Steam\Steam.exe -silent
O4 - Startup: OpenOffice.org 2.0.lnk = D:\Programme\OpenOffice.org 2.0\program\quickstart.exe
O4 - Global Startup: Adobe Reader - Schnellstart.lnk = C:\Programme\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programme\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra->Tools' menuitem: Sun Java Konsole - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programme\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%\Network Diagnostic\xpnetdiag.exe (file missing)
O9 - Extra->Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%\Network Diagnostic\xpnetdiag.exe (file missing)
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
O11 - Options group: [INTERNATIONAL] International*
O16 - DPF: {264AED84-12F1-4CA1-8AA7-EB939AE58D8D} (STCWeb Control) -
https://vpn3030-3.rz.rwth-aachen.de/CACHE/webvpn/stc/1/binaries/stcweb.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) -
http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1163711299625
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - C:\WINDOWS\system32\WPDShServiceObj.dll
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: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Cisco Systems, Inc. STC Agent (STCAgent) - Cisco Systems, Inc. - C:\Programme\Cisco Systems\SSL VPN Client\agent.exe