Und das ist dann der Hijack Report:
Logfile of HijackThis v1.99.1
Scan saved at 18:13:22, on 06.05.2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\csrss.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:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programme\AntiVir PersonalEdition Classic\avguard.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\SOUNDMAN.EXE
C:\Programme\AntiVir PersonalEdition Classic\avgnt.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\WINDOWS\system32\ctfmon.exe
C:\Programme\Webroot\Spy Sweeper\SpySweeper.exe
C:\Programme\AntiVir PersonalEdition Classic\sched.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\alg.exe
C:\Programme\Internet Explorer\IEXPLORE.EXE
C:\Programme\ArcorOnline\Arcor.exe
D:\Downloads\Antivirenprogramme\HijackThis\hijackthis_199\HijackThis.exe
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://www.arcor.de
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.arcor.de
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.arcor.de
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://www.arcor.de
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://www.arcor.de
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.arcor.de
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Arcor AG & Co. KG
R3 - URLSearchHook: Yahoo! Toolbar mit Pop-Up-Blocker - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programme\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:\Programme\Yahoo!\Companion\Installs\cpn\yt.dll
O3 - Toolbar: Yahoo! Toolbar mit Pop-Up-Blocker - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programme\Yahoo!\Companion\Installs\cpn\yt.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [avgnt] "C:\Programme\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: [SpySweeper] "C:\Programme\Webroot\Spy Sweeper\SpySweeper.exe" /0
O4 - HKCU\..\Run: [ccleaner] "C:\Programme\CCleaner\ccleaner.exe" /AUTO
O9 - Extra button: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file missing)
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner v8 - {85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file missing)
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (YInstStarter Class) - C:\Programme\Yahoo!\Common\yinsthelper.dll
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} (BDSCANONLINE Control) - http://www.bitdefender.de/scan_de/scan8/oscan8.cab
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://acs.pandasoftware.com/activescan/as5free/asinst.cab
O16 - DPF: {9D190AE6-C81E-4039-8061-978EBAD10073} (F-Secure Online Scanner 3.0) - http://support.f-secure.com/ols/fscax.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{7D845C76-5405-4F7D-8976-82420F8C0E2C}: NameServer = 195.50.140.114 195.50.140.252
O17 - HKLM\System\CS1\Services\Tcpip\..\{7D845C76-5405-4F7D-8976-82420F8C0E2C}: NameServer = 195.50.140.114 195.50.140.252
O23 - Service: AntiVir PersonalEdition Classic Planer (AntiVirScheduler) - Avira GmbH - C:\Programme\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: AntiVir PersonalEdition Classic Guard (AntiVirService) - Avira GmbH - C:\Programme\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe