Here the HijackThis-Logfile:

Logfile of HijackThis v1.99.1
Scan saved at 19:01:44, on 14.04.2007
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\SOUNDMAN.EXE
C:\WINDOWS\SYSTEM32\USRmlnkA.exe
C:\Programme\Ahead\InCD\InCD.exe
C:\Programme\Scroll Mouse\4DMAIN.EXE
C:\WINDOWS\SYSTEM32\USRshutA.exe
C:\WINDOWS\SYSTEM32\USRmlnkA.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Programme\HP\HP Software Update\HPWuSchd2.exe
C:\Programme\ICQLite\ICQLite.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Programme\HP\Digital Imaging\bin\hpqtra08.exe
C:\Programme\HP\Digital Imaging\bin\hpqSTE08.exe
C:\Programme\WinRAR\WinRAR.exe
C:\DOKUME~1\Jule\LOKALE~1\Temp\Rar$EX00.172\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://google.icq.com/search/search_frame.php
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.gmx.de/
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: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programme\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\programme\google\googletoolbar2.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: GMX Toolbar - {2D1DDD38-CE4D-459b-A01C-F11BC92D5B69} - C:\Programme\GMX\GMX Toolbar\toolbar.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\programme\google\googletoolbar2.dll
O3 - Toolbar: ICQ Toolbar - {855F3B16-6D32-4fe6-8A56-BBB695989046} - C:\Programme\ICQToolbar\toolbaru.dll
O4 - HKLM..\Run: [IMJPMIG8.1] “C:\WINDOWS\IME\imjp8_1\IMJPMIG.EXE” /Spoil /RemAdvDef /Migration32
O4 - HKLM..\Run: [PHIME2002ASync] C:\WINDOWS\System32\IME\TINTLGNT\TINTSETP.EXE /SYNC
O4 - HKLM..\Run: [PHIME2002A] C:\WINDOWS\System32\IME\TINTLGNT\TINTSETP.EXE /IMEName
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: [NeroCheck] C:\WINDOWS\System32\NeroCheck.exe
O4 - HKLM..\Run: [QuickFinder Scheduler] c:\Corel\Office7\Shared\QFinder7\QFSCHED.EXE
O4 - HKLM..\Run: [USRpdA] C:\WINDOWS\SYSTEM32\USRmlnkA.exe RunServices \Device\3cpipe-USRpdA
O4 - HKLM..\Run: [PromulGate] “C:\Programme\DelFin\PromulGate\PgMonitr.exe”
O4 - HKLM..\Run: [QuickTime Task] “C:\Programme\QuickTime\qttask.exe” -atboottime
O4 - HKLM..\Run: [InCD] C:\Programme\Ahead\InCD\InCD.exe
O4 - HKLM..\Run: [WheelMouse] C:\Programme\Scroll Mouse\4DMAIN.EXE
O4 - HKLM..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM..\Run: [HP Software Update] C:\Programme\HP\HP Software Update\HPWuSchd2.exe
O4 - HKLM..\Run: [ICQ Lite] “C:\Programme\ICQLite\ICQLite.exe” -minimize
O4 - HKCU..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU..\RunOnce: [ICQ Lite] C:\Programme\ICQLite\ICQLite.exe -trayboot
O4 - Global Startup: Microsoft Office.lnk = C:\Programme\Microsoft Office\Office10\OSA.EXE
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Programme\HP\Digital Imaging\bin\hpqtra08.exe
O8 - Extra context menu item: &Google Search - res://c:\programme\google\GoogleToolbar2.dll/cmsearch.html
O8 - Extra context menu item: Im Cache gespeicherte Seite - res://c:\programme\google\GoogleToolbar2.dll/cmcache.html
O8 - Extra context menu item: Nach Microsoft &Excel exportieren - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Verweisseiten - res://c:\programme\google\GoogleToolbar2.dll/cmbacklinks.html
O8 - Extra context menu item: Ähnliche Seiten - res://c:\programme\google\GoogleToolbar2.dll/cmsimilar.html
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
O12 - Plugin for .mid: C:\Programme\Internet Explorer\PLUGINS\npqtplugin2.dll
O12 - Plugin for .spop: C:\Programme\Internet Explorer\Plugins\NPDocBox.dll
O12 - Plugin for .wav: C:\Programme\Internet Explorer\PLUGINS\npqtplugin.dll
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - C:\Programme\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - Unknown owner - C:\Programme\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - C:\Programme\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - C:\Programme\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\System32\HPZipm12.exe