Recurring Trojan

I have performed a system scan twice, and deleted the items as instructed. However, when I run the scan it says that I cannot access the hosts file? In any event, please see the logfile:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 11:40:12 AM, on 12/1/2009
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\Explorer.EXE
C:\WINDOWS\System32\hkcmd.exe
C:\Program Files\LogMeIn\LogMeInSystray.exe
C:\Program Files\PFU\ScanSnap\PfuSsSct.exe
C:\Program Files\PFU\ScanSnap\CardMinder V2.0\CardLauncher.exe
C:\Program Files\Avira\AntiVir Desktop\avgnt.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\PFU\ScanSnap\Driver\PfuSsMon.exe
C:\Program Files\WinZip\WZQKPICK.EXE
C:\Program Files\PFU\ScanSnap\CardMinder V2.0\bcd_file\SbCRecE.exe
C:\Program Files\Mozilla Firefox\firefox.exe
F:\DISC\LL300.EXE
C:\Documents and Settings\frontdesk\Desktop\DOMI\Misc\Virus Info\winlogon.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.tfciloan.com/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http:\\www.tfciloan.com
F2 - REG:system.ini: UserInit=C:\WINDOWS\system32\userinit.exe
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {295a9c21-ef80-4263-9718-8f0895360e7d} - vobuturi.dll (file missing)
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.5.0_09\bin\ssv.dll
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\System32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\System32\hkcmd.exe
O4 - HKLM\..\Run: [LogMeIn GUI] "C:\Program Files\LogMeIn\LogMeInSystray.exe"
O4 - HKLM\..\Run: [PfuSsSct.exe] C:\Program Files\PFU\ScanSnap\PfuSsSct.exe /Station
O4 - HKLM\..\Run: [CardMinder] C:\Program Files\PFU\ScanSnap\CardMinder V2.0\CardLauncher.exe
O4 - HKLM\..\Run: [Pdfquickview] C:\Program Files\PFU\ScanSnap\PDF Thumbnail View\pdfquickview.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - Global Startup: ScanSnap Manager.lnk = ?
O4 - Global Startup: WinZip Quick Pick.lnk = C:\Program Files\WinZip\WZQKPICK.EXE
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_09\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_09\bin\ssv.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O14 - IERESET.INF: START_PAGE_URL=http:\\www.tfciloan.com
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (Installation Support) - C:\Program Files\Yahoo!\Common\Yinsthelper.dll
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://www.update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/muweb_site.cab?1190907624051
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: Domain = tfci
O17 - HKLM\Software\..\Telephony: DomainName = tfci
O17 - HKLM\System\CCS\Services\Tcpip\..\{76D00B9A-19A3-4835-9982-92D7C78FE6D9}: NameServer = 192.168.1.251
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: Domain = tfci
O23 - Service: Avira AntiVir Scheduler (AntiVirSchedulerService) - Avira GmbH - C:\Program Files\Avira\AntiVir Desktop\sched.exe
O23 - Service: Avira AntiVir Guard (AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir Desktop\avguard.exe
O23 - Service: DSBrokerService - Unknown owner - C:\Program Files\DellSupport\brkrsvc.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe

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End of file - 3823 bytes

Please download Malwarebytes Anti-Malware from here.

Double Click mbam-setup.exe to install the application.

• Make sure a checkmark is placed next to Update Malwarebytes' Anti-Malware and Launch Malwarebytes Anti-Malware, then click Finish.
  
• If an update is found, it will download and install the latest version.
  
• Once the program has loaded, select "Perform Full Scan", then click Scan.
  
• The scan may take some time to finish,so please be patient.
  
• When the scan is complete, click OK, then Show Results to view the results.
  
• Make sure that everything is checked, and click Remove Selected.
  
• When disinfection is completed, a log will open in Notepad and you may be prompted to Restart. (See Extra Note)
  
• Please save the log to a location you will remember.
  
• The log is automatically saved by MBAM and can be viewed by clicking the Logs tab in MBAM.
  
• Copy and paste the entire report in your next reply.
  

Extra Note:

If MBAM encounters a file that is difficult to remove,you will be presented with 1 of 2 prompts,click OK to either and let MBAM proceed with the disinfection process. If asked to restart the computer, please do so immediately.