So. Erstmal danke für eure Bemühungen.
Ich habe jetzt den Scan auch mal mit Kaspersky durchgeführt, der befand - wie AntiVir - dass mein PC topsauber sei. Das Problem tritt wirklich nur auf, wenn CCleaner auf die Dateien zugreift, bzw. sie überschreiben will.
Hier mal das HiJackThis-Log, vielleicht erkennt da jemand etwas:
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\Sygate\SPF\smc.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\System32\brsvc01a.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\System32\brss01a.exe
C:\WINDOWS\system32\Brmfrmps.exe
C:\WINDOWS\System32\svchost.exe
C:\Programme\Java\jre1.5.0_06\bin\jusched.exe
C:\WINDOWS\System32\hkcmd.exe
C:\WINDOWS\mHotkey.exe
C:\Programme\Eraser\eraser.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programme\AntiVir PersonalEdition Classic\sched.exe
C:\Programme\AntiVir PersonalEdition Classic\avguard.exe
C:\Programme\AntiVir PersonalEdition Classic\avgnt.exe
C:\Programme\Mozilla Firefox\firefox.exe
C:\Dokumente und Einstellungen\A1\Desktop\HiJackThis_v2.exe
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 =
https://blueadit.bluewin.ch/adsl/router/index_d.html
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programme\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programme\Java\jre1.5.0_06\bin\ssv.dll
O2 - BHO: WebSpeechBHO Class - {83A30C59-3A50-49E6-9DAF-4923C4EA3C23} - C:\Programme\Gemeinsame Dateien\WebSpeech.4.0\LgxIEBar.dll
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programme\Java\jre1.5.0_06\bin\jusched.exe
O4 - HKLM\..\Run: [SmcService] C:\PROGRA~1\Sygate\SPF\smc.exe -startgui
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\System32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\System32\hkcmd.exe
O4 - HKLM\..\Run: [CHotkey] mHotkey.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [avgnt] "C:\Programme\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKCU\..\Run: [Eraser] C:\Programme\Eraser\eraser.exe -hide
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Policies\Explorer\Run: [{2C163FFD-0960-2055-1024-030916200029}] "C:\Programme\Gemeinsame Dateien\{2C163FFD-0960-2055-1024-030916200029}\Update.exe" mc-110-12-0000103
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')
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Restrictions present
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programme\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Konsole - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programme\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra button: WebSpeech - {1CE4DE72-7FCC-4eb8-8F66-AE6A56A0A54D} - C:\Programme\Gemeinsame Dateien\WebSpeech.4.0\LgxIEBar.dll
O9 - Extra 'Tools' menuitem: Seite/Markierung vorlesen (WebSpeech) - {1CE4DE72-7FCC-4eb8-8F66-AE6A56A0A54D} - C:\Programme\Gemeinsame Dateien\WebSpeech.4.0\LgxIEBar.dll
O9 - Extra button: Run WinHTTrack - {36ECAF82-3300-8F84-092E-AFF36D6C7040} - C:\Programme\WinHTTrack\WinHTTrackIEBar.dll
O9 - Extra 'Tools' menuitem: Launch WinHTTrack - {36ECAF82-3300-8F84-092E-AFF36D6C7040} - C:\Programme\WinHTTrack\WinHTTrackIEBar.dll
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
O9 - Extra button: MedionShop - {1BE7B301-ED56-4E47-BCA8-68D80A44DCB8} -
http://www.medionshop.de/ (file missing) (HKCU)
O16 - DPF: {15AD6789-CDB4-47E1-A9DA-992EE8E6BAD6} -
http://static.windupdates.com/cab/Me.../bridge-c9.cab
O16 - DPF: {56336BCB-3D8A-11D6-A00B-0050DA18DE71} -
http://software-dl.real.com/04965008...p/RdxIE601.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) -
http://update.microsoft.com/microsof...?1153845286234
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) -
http://update.microsoft.com/microsof...?1153845278359
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) -
http://messenger.msn.com/download/ms...downloader.cab
O20 - AppInit_DLLs: c:\windows\system32\jkhhfcd.dll
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: 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: Brother Popup Suspend service for Resource manager (brmfrmps) - Brother Industries, Ltd. - C:\WINDOWS\system32\Brmfrmps.exe
O23 - Service: BrSplService (Brother XP spl Service) - brother Industries Ltd - C:\WINDOWS\System32\brsvc01a.exe
O23 - Service: CA-Lizenz-Client (CA_LIC_CLNT) - Brother Industries Ltd. - (no file)
O23 - Service: CA-Lizenzserver (CA_LIC_SRVR) - Brother Industries Ltd. - (no file)
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programme\Gemeinsame Dateien\InstallShield\Driver\1150\Intel 32\IDriverT.exe
O23 - Service: Steganos Live Encryption Engine 12 [Service] (SLEE_12_SERVICE) - Unknown owner - C:\WINDOWS\System32\SLEE12.exe (file missing)
O23 - Service: Sygate Personal Firewall (SmcService) - Sygate Technologies, Inc. - C:\Programme\Sygate\SPF\smc.exe
O23 - Service: Sony SPTI Service (SPTISRV) - Unknown owner - C:\Programme\Gemeinsame Dateien\Sony Shared\AVLib\SPTISRV.exe (file missing)
O23 - Service: FireDaemon Service: system (system) - Unknown owner - C:\WINDOWS\Temp\FireDaemon.EXE (file missing)
O23 - Service: TuneUp WinStyler Theme Service (TUWinStylerThemeSvc) - TuneUp Software GmbH - C:\Programme\TuneUp Utilities 2006\WinStylerThemeSvc.exe