Trojaner-Board - Trojaner/Dropper.gen wie entfernen?

Hallo,
Avira hat angezeigt, dass ich mir einen Trojaner/Dropper.gen eingefangen habe.
Wie kann ich ihn löschen?

HiJackThis LogFile:

Logfile of Trend Micro HijackThis v2.0.3 (BETA)
Scan saved at 16:35:19, on 13.03.2010
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
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\spoolsv.exe
C:\Programme\Avira\AntiVir Desktop\sched.exe
C:\Programme\Avira\AntiVir Desktop\avguard.exe
C:\Programme\ICQ6Toolbar\ICQ Service.exe
C:\Programme\Java\jre6\bin\jqs.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\Qmysia.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\WINDOWS\system32\wuauclt.exe
C:\Programme\ScanSoft\PaperPort\pptd40nt.exe
C:\Programme\Gemeinsame Dateien\Java\Java Update\jusched.exe
C:\Programme\Avira\AntiVir Desktop\avgnt.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programme\Brother\ControlCenter3\brccMCtl.exe
C:\DOKUME~1\NAME\LOKALE~1\Temp\Qtx.exe
C:\Programme\TrendMicro\HiJackThis\HiJackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://start.icq.com/
R3 - URLSearchHook: ICQToolBar - {855F3B16-6D32-4fe6-8A56-BBB695989046} - C:\Programme\ICQ6Toolbar\ICQToolBar.dll
R3 - URLSearchHook: (no name) - - (no file)
O2 - BHO: Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programme\Gemeinsame Dateien\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Programme\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Programme\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O3 - Toolbar: ICQToolBar - {855F3B16-6D32-4FE6-8A56-BBB695989046} - C:\Programme\ICQ6Toolbar\ICQToolBar.dll
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Programme\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [SSBkgdUpdate] "C:\Programme\Gemeinsame Dateien\Scansoft Shared\SSBkgdUpdate\SSBkgdupdate.exe" -Embedding -boot
O4 - HKLM\..\Run: [PaperPort PTD] "C:\Programme\ScanSoft\PaperPort\pptd40nt.exe"
O4 - HKLM\..\Run: [IndexSearch] "C:\Programme\ScanSoft\PaperPort\IndexSearch.exe"
O4 - HKLM\..\Run: [PPort11reminder] "C:\Programme\ScanSoft\PaperPort\Ereg\Ereg.exe" -r "C:\Dokumente und Einstellungen\All Users\Anwendungsdaten\ScanSoft\PaperPort\11\Config\Ereg\Ereg.ini"
O4 - HKLM\..\Run: [BrMfcWnd] C:\Programme\Brother\Brmfcmon\BrMfcWnd.exe /AUTORUN
O4 - HKLM\..\Run: [ControlCenter3] C:\Programme\Brother\ControlCenter3\brctrcen.exe /autorun
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programme\Gemeinsame Dateien\Java\Java Update\jusched.exe"
O4 - HKLM\..\Run: [avgnt] "C:\Programme\Avira\AntiVir Desktop\avgnt.exe" /min
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [NAME] C:\Dokumente und Einstellungen\NAME\NAME.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Programme\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [TOY5KNQ8OC] C:\DOKUME~1\NAME\LOKALE~1\Temp\Qtx.exe
O4 - HKCU\..\Run: [ICQ] "C:\Programme\ICQ7.0\ICQ.exe" silent loginmode=4
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.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\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'Default user')
O9 - Extra button: ICQ7 - {88EB38EF-4D2C-436D-ABD3-56B232674062} - C:\Programme\ICQ7.0\ICQ.exe
O9 - Extra 'Tools' menuitem: ICQ7 - {88EB38EF-4D2C-436D-ABD3-56B232674062} - C:\Programme\ICQ7.0\ICQ.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
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1264351398625
O22 - SharedTaskScheduler: Browseui preloader - {438755C2-A8BA-11D1-B96B-00A0C90312E1} - C:\WINDOWS\System32\browseui.dll
O22 - SharedTaskScheduler: Component Categories cache daemon - {8C7461EF-2B13-11d2-BE35-3078302C2030} - C:\WINDOWS\System32\browseui.dll
O23 - Service: Avira AntiVir Planer (AntiVirSchedulerService) - Avira GmbH - C:\Programme\Avira\AntiVir Desktop\sched.exe
O23 - Service: Avira AntiVir Guard (AntiVirService) - Avira GmbH - C:\Programme\Avira\AntiVir Desktop\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: ICQ Service - Unknown owner - C:\Programme\ICQ6Toolbar\ICQ Service.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Programme\Java\jre6\bin\jqs.exe

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End of file - 5161 bytes

Dankeschön
<3