Hello from Switzerland. My computer is infected with 'bestsafetyguide' and 'System Doctor' and my attempts to remove it with Spybot, McAffee and Trend Micro Online Scan have all failed. I'd be grateful for any help. HijackThis logfile as follows:

Logfile of HijackThis v1.99.1
Scan saved at 19:26:10, on 14.06.2006
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\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\Dell\Bluetooth Software\bin\btwdins.exe
c:\programme\mcafee.com\agent\mcdetect.exe
c:\PROGRA~1\mcafee.com\vso\mcshield.exe
c:\PROGRA~1\mcafee.com\agent\mctskshd.exe
C:\Programme\Gemeinsame Dateien\Microsoft Shared\VS7Debug\mdm.exe
C:\PROGRA~1\McAfee.com\PERSON~1\MpfService.exe
C:\PROGRA~1\McAfee\SPAMKI~1\MSKSrvr.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\WLTRYSVC.EXE
C:\WINDOWS\System32\bcmwltry.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\Programme\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\Programme\Dell\QuickSet\quickset.exe
C:\WINDOWS\system32\dla\tfswctrl.exe
C:\Programme\Dell\Media Experience\PCMService.exe
C:\Programme\CyberLink\PowerDVD\DVDLauncher.exe
C:\PROGRA~1\mcafee.com\agent\mcagent.exe
C:\Programme\McAfee.com\VSO\mcvsshld.exe
C:\PROGRA~1\McAfee\SPAMKI~1\MSKAgent.exe
C:\PROGRA~1\McAfee.com\PERSON~1\MpfTray.exe
C:\Programme\McAfee.com\VSO\oasclnt.exe
c:\progra~1\mcafee.com\vso\mcvsescn.exe
C:\Programme\QuickTime\qttask.exe
C:\Programme\iTunes\iTunesHelper.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programme\iPod\bin\iPodService.exe
C:\Programme\Spybot - Search & Destroy\TeaTimer.exe
C:\Programme\Dell\Bluetooth Software\BTTray.exe
C:\Programme\Digital Line Detect\DLG.exe
C:\Programme\Sony Corporation\Image Transfer\SonyTray.exe
C:\PROGRA~1\McAfee.com\PERSON~1\MpfAgent.exe
C:\PROGRA~1\Dell\BLUETO~1\BTSTAC~1.EXE
C:\WINDOWS\System32\svchost.exe
C:\Programme\Internet Explorer\iexplore.exe
C:\Programme\Internet Explorer\iexplore.exe
c:\programme\mcafee.com\shared\mcinfo.exe
C:\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.euro.dell.com/countries/a...en/default.htm
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://g.msn.de/0SEDEDE/SAOS01?FORM=TOOLBR
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.bluewin.ch/
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.bluewin.ch/
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://g.msn.de/0SEDEDE/SAOS01?FORM=TOOLBR
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://www.euro.dell.com/countries/a...en/default.htm
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:\Programme\Yahoo!\Companion\Installs\cpn0\yt.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programme\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: McAfee AntiPhishing Filter - {41D68ED8-4CFF-4115-88A6-6EBB8AF19000} - c:\programme\mcafee\spamkiller\mcapfbho.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: DriveLetterAccess - {5CA3D70E-1895-11CF-8E15-001234567890} - C:\WINDOWS\system32\dla\tfswshx.dll
O2 - BHO: Nothing - {686a161d-5bd1-4999-8832-6393f41e564c} - C:\WINDOWS\system32\hp100.tmp
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\programme\google\googletoolbar2.dll
O2 - BHO: MSN Suche Toolbar Helper - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programme\MSN Toolbar Suite\TB\02.05.0000.1082\de-de\msntb.dll
O3 - Toolbar: McAfee VirusScan - {BA52B914-B692-46c4-B683-905236F6F655} - c:\progra~1\mcafee.com\vso\mcvsshl.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programme\Yahoo!\Companion\Installs\cpn0\yt.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\programme\google\googletoolbar2.dll
O3 - Toolbar: MSN Suche Toolbar - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programme\MSN Toolbar Suite\TB\02.05.0000.1082\de-de\msntb.dll
O4 - HKLM\..\Run: [ATIPTA] C:\Programme\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [Dell QuickSet] C:\Programme\Dell\QuickSet\quickset.exe
O4 - HKLM\..\Run: [dla] C:\WINDOWS\system32\dla\tfswctrl.exe
O4 - HKLM\..\Run: [UpdateManager] "C:\Programme\Gemeinsame Dateien\Sonic\Update Manager\sgtray.exe" /r
O4 - HKLM\..\Run: [PCMService] "C:\Programme\Dell\Media Experience\PCMService.exe"
O4 - HKLM\..\Run: [DVDLauncher] "C:\Programme\CyberLink\PowerDVD\DVDLauncher.exe"
O4 - HKLM\..\Run: [VSOCheckTask] "C:\PROGRA~1\McAfee.com\VSO\mcmnhdlr.exe" /checktask
O4 - HKLM\..\Run: [MCAgentExe] c:\PROGRA~1\mcafee.com\agent\mcagent.exe
O4 - HKLM\..\Run: [MCUpdateExe] C:\PROGRA~1\mcafee.com\agent\mcupdate.exe
O4 - HKLM\..\Run: [VirusScan Online] C:\Programme\McAfee.com\VSO\mcvsshld.exe
O4 - HKLM\..\Run: [MSKAGENTEXE] C:\PROGRA~1\McAfee\SPAMKI~1\MSKAgent.exe
O4 - HKLM\..\Run: [MSKDetectorExe] C:\PROGRA~1\McAfee\SPAMKI~1\MSKDetct.exe /startup
O4 - HKLM\..\Run: [MPFExe] C:\PROGRA~1\McAfee.com\PERSON~1\MpfTray.exe
O4 - HKLM\..\Run: [OASClnt] C:\Programme\McAfee.com\VSO\oasclnt.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programme\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "C:\Programme\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [NI.UERSU_0001_N68M1402] "C:\Dokumente und Einstellungen\Sarah\Lokale Einstellungen\Temporary Internet Files\Content.IE5\H7ZZDT4A\ErrorSafeScannerInstall_de[1].exe" -nag
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MSKAGENTEXE] C:\PROGRA~1\McAfee\SPAMKI~1\MSKAgent.exe
O4 - HKCU\..\Run: [msnmsgr] "C:\Programme\MSN Messenger\msnmsgr.exe" /background
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Programme\Spybot - Search & Destroy\TeaTimer.exe
O4 - Global Startup: Adobe Gamma Loader.lnk = ?
O4 - Global Startup: BTTray.lnk = ?
O4 - Global Startup: Digital Line Detect.lnk = ?
O4 - Global Startup: Image Transfer.lnk = ?
O4 - Global Startup: Microsoft Office.lnk = C:\Programme\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: &MSN Suche - res://C:\Programme\MSN Toolbar Suite\TB\02.05.0000.1082\de-de\msntb.dll/search.htm
O8 - Extra context menu item: Nach Microsoft &Excel exportieren - res://C:\PROGRA~1\MICROS~3\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Senden an &Bluetooth - C:\Programme\Dell\Bluetooth Software\btsendto_ie_ctx.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programme\Java\j2re1.4.2_03\bin\npjpi142_03.dll
O9 - Extra 'Tools' menuitem: Sun Java Konsole - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programme\Java\j2re1.4.2_03\bin\npjpi142_03.dll
O9 - Extra button: (no name) - {39FD89BF-D3F1-45b6-BB56-3582CCF489E1} - c:\programme\mcafee\spamkiller\mcapfbho.dll
O9 - Extra 'Tools' menuitem: McAfee AntiPhishing Filter - {39FD89BF-D3F1-45b6-BB56-3582CCF489E1} - c:\programme\mcafee\spamkiller\mcapfbho.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
O16 - DPF: {4ED9DDF0-7479-4BBE-9335-5A1EDB1D8A21} (McAfee.com Operating System Class) - http://download.mcafee.com/molbin/sh...4/mcinsctl.cab
O16 - DPF: {BCC0FF27-31D9-4614-A68E-C18E1ADA4389} (DwnldGroupMgr Class) - http://download.mcafee.com/molbin/sh...21/mcgdmgr.cab
O18 - Protocol: widimg - {EE7C2AFF-5742-44FF-BD0E-E521B0D3C3BA} - C:\WINDOWS\system32\btxppanel.dll
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: Bluetooth Service (btwdins) - WIDCOMM, Inc. - C:\Programme\Dell\Bluetooth Software\bin\btwdins.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programme\Gemeinsame Dateien\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: iPodService - Apple Computer, Inc. - C:\Programme\iPod\bin\iPodService.exe
O23 - Service: McAfee WSC Integration (McDetect.exe) - McAfee, Inc - c:\programme\mcafee.com\agent\mcdetect.exe
O23 - Service: McAfee.com McShield (McShield) - McAfee Inc. - c:\PROGRA~1\mcafee.com\vso\mcshield.exe
O23 - Service: McAfee Task Scheduler (McTskshd.exe) - McAfee, Inc - c:\PROGRA~1\mcafee.com\agent\mctskshd.exe
O23 - Service: McAfee SecurityCenter Update Manager (mcupdmgr.exe) - McAfee, Inc - C:\PROGRA~1\McAfee.com\Agent\mcupdmgr.exe
O23 - Service: McAfee Personal Firewall Service (MpfService) - McAfee Corporation - C:\PROGRA~1\McAfee.com\PERSON~1\MpfService.exe
O23 - Service: McAfee SpamKiller Server (MskService) - McAfee Inc. - C:\PROGRA~1\McAfee\SPAMKI~1\MSKSrvr.exe
O23 - Service: WLTRYSVC - Unknown owner - C:\WINDOWS\System32\WLTRYSVC.EXE


Many thanks for your help.