Hijacked! Please help!

I was hijacked and now my homepage keeps reverting to C:\WINDOWS\System32\msblank.html. Here is the log for HighjackThis. Can somebody please tell me how to go about fixing this and which things are bad and need to go?!

Logfile of HijackThis v1.99.1
Scan saved at 10:26:19 PM, on 12/22/2005
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\csrss.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:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Common Files\AOL\TopSpeed\2.0\aoltsmon.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Common Files\AOL\TopSpeed\2.0\aoltpspd.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\wdfmgr.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Java\jre1.5.0_02\bin\jusched.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\WINDOWS\System32\spool\drivers\w32x86\3\hpztsb0 7.exe
C:\Program Files\Java\jre1.5.0_02\bin\jucheck.exe
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\Logitech\iTouch\iTouch.exe
C:\WINDOWS\System32\popcorn72.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\ATI Multimedia\main\ATIDtct.EXE
C:\Program Files\ATI Multimedia\RemCtrl\ATIRW.exe
C:\WINDOWS\System32\rundll32.exe
C:\WINDOWS\System32\wuauclt.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\TEMP\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = C:\WINDOWS\System32\msblank.html
R3 - URLSearchHook: (no name) - {BE89472C-B803-4D1D-9A9A-0A63660E0FE3} - C:\PROGRA~1\COPERN~1\COPERN~1.DLL
F2 - REG:system.ini: UserInit=userinit.exe
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: (no name) - {E0E899AB-F487-11D5-8D29-0050BA6940E3} - (no file)
O3 - Toolbar: Copernic Agent - {F2E259E8-0FC8-438C-A6E0-342DD80FA53E} - C:\PROGRA~1\COPERN~1\COPERN~1.DLL
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll
O4 - HKLM\..\Run: [VTPreset] VTPreset.exe
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0_02\bin\jusched.exe
O4 - HKLM\..\Run: [PinnacleDriverCheck] C:\WINDOWS\System32\PSDrvCheck.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [HPDJ Taskbar Utility] C:\WINDOWS\System32\spool\drivers\w32x86\3\hpztsb0 7.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [zBrowser Launcher] C:\Program Files\Logitech\iTouch\iTouch.exe
O4 - HKLM\..\Run: [THGuard] "C:\Program Files\TrojanHunter 4.2\THGuard.exe"
O4 - HKLM\..\Run: [hgqhp.exe] C:\WINDOWS\System32\hgqhp.exe
O4 - HKLM\..\Run: [ControlPanel] C:\WINDOWS\System32\popcorn72.exe rundll.dll,LoadMouseProfile
O4 - HKCU\..\Run: [ATI Launchpad] "C:\Program Files\ATI Multimedia\main\launchpd.exe"
O4 - HKCU\..\Run: [ATI DeviceDetect] C:\Program Files\ATI Multimedia\main\ATIDtct.EXE
O4 - HKCU\..\Run: [ATI Remote Control] C:\Program Files\ATI Multimedia\RemCtrl\ATIRW.exe
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\MSN Messenger\msnmsgr.exe" /background
O4 - HKCU\..\Run: [UnSpyPC] "C:\Program Files\UnSpyPC\UnSpyPC.exe"
O4 - Global Startup: Adobe Reader Speed Launch.lnk = C:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O8 - Extra context menu item: &AOL Toolbar search - res://C:\Program Files\AOL Toolbar\toolbar.dll/SEARCH.HTML
O8 - Extra context menu item: &Google Search - res://c:\program files\google\GoogleToolbar1.dll/cmsearch.html
O8 - Extra context menu item: &Translate English Word - res://c:\program files\google\GoogleToolbar1.dll/cmwordtrans.html
O8 - Extra context menu item: Backward Links - res://c:\program files\google\GoogleToolbar1.dll/cmbacklinks.html
O8 - Extra context menu item: Cached Snapshot of Page - res://c:\program files\google\GoogleToolbar1.dll/cmcache.html
O8 - Extra context menu item: Search Using Copernic Agent - res://C:\Program Files\Copernic Agent\CopernicAgentExt.dll/INTEGRATION_MENU_SEARCHEXT
O8 - Extra context menu item: Similar Pages - res://c:\program files\google\GoogleToolbar1.dll/cmsimilar.html
O8 - Extra context menu item: Translate Page into English - res://c:\program files\google\GoogleToolbar1.dll/cmtrans.html
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_02\bin\npjpi150_02.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_02\bin\npjpi150_02.dll
O9 - Extra button: (no name) - {193B17B0-7C9F-4D5B-AEAB-8D3605EFC084} - C:\PROGRA~1\COPERN~1\COPERN~1.EXE
O9 - Extra 'Tools' menuitem: Launch Copernic Agent - {193B17B0-7C9F-4D5B-AEAB-8D3605EFC084} - C:\PROGRA~1\COPERN~1\COPERN~1.EXE
O9 - Extra button: ATI TV - {44226DFF-747E-4edc-B30C-78752E50CD0C} - C:\Program Files\ATI Multimedia\tv\EXPLBAR.DLL
O9 - Extra button: Copernic Agent - {688DC797-DC11-46A7-9F1B-445F4F58CE6E} - C:\PROGRA~1\COPERN~1\COPERN~1.EXE
O9 - Extra button: AIM - {AC9E2541-2814-11d5-BC6D-00B0D0A1DE45} - C:\Program Files\AIM\aim.exe
O9 - Extra button: Real.com - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - C:\WINDOWS\System32\Shdocvw.dll
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\MSMSGS.EXE (file missing)
O9 - Extra 'Tools' menuitem: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\MSMSGS.EXE (file missing)
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {1C955F3B-5B32-4393-A05D-24B4970CD2A1} - http://streamp.babenet.com/cabs/videox.cab
O16 - DPF: {37DF41B2-61DB-4CAC-A755-CFB3C7EE7F40} - http://esupport.aol.com/help/acp2/en...ach_core_1.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://by10fd.bay10.hotmail.msn.com/...s/MsnPUpld.cab
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsof...?1134280171359
O17 - HKLM\System\CCS\Services\Tcpip\..\{1E7FEECA-4278-43DC-ADAD-96245952BFDE}: NameServer = 85.255.113.148,85.255.112.20
O17 - HKLM\System\CCS\Services\Tcpip\..\{CEDBAFAF-9D31-438F-8505-AC9DA36066BD}: NameServer = 85.255.113.148,85.255.112.20
O17 - HKLM\System\CCS\Services\Tcpip\..\{F812E23A-853F-4978-BAEC-16DB2CCB6163}: NameServer = 85.255.113.148,85.255.112.20
O23 - Service: AOL TopSpeed Monitor (AOL TopSpeedMonitor) - America Online, Inc - C:\Program Files\Common Files\AOL\TopSpeed\2.0\aoltsmon.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: Pml Driver HPH11 - HP - C:\WINDOWS\System32\HPHipm11.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\System32\HPZipm12.exe