log hijack this

Logfile of HijackThis v1.99.1
Scan saved at 19:43:25, on 29/4/2006
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\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\spoolsv.exe
C:\Arquivos de programas\Alwil Software\Avast4\aswUpdSv.exe
C:\Arquivos de programas\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\WINDOWS\System32\HPZipm12.exe
C:\Arquivos de programas\Analog Devices\SoundMAX\SMAgent.exe
C:\WINDOWS\System32\svchost.exe
C:\Arquivos de programas\Alwil Software\Avast4\ashWebSv.exe
C:\Arquivos de programas\Alwil Software\Avast4\ashMaiSv.exe
C:\WINDOWS\Explorer.EXE
C:\ARQUIV~1\ALWILS~1\Avast4\ashDisp.exe
C:\Arquivos de programas\Java\jre1.5.0_03\bin\jusched.exe
C:\Arquivos de programas\Skype\Phone\Skype.exe
C:\Arquivos de programas\Microsoft AntiSpyware\gcasDtServ.exe
C:\Arquivos de programas\Alwil Software\Avast4\ashSimpl.exe
C:\Arquivos de programas\Internet Explorer\IEXPLORE.EXE
C:\Hijack This\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://curso.divinaciencia.com/
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://curso.divinaciencia.com/
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = .ist.utl.pt
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Arquivos de programas\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\arquivos de programas\google\googletoolbar2.dll
O3 - Toolbar: &Rádio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\arquivos de programas\google\googletoolbar2.dll
O4 - HKLM\..\Run: [avast!] C:\ARQUIV~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [gcasServ] "C:\Arquivos de programas\Microsoft AntiSpyware\gcasServ.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Arquivos de programas\Java\jre1.5.0_03\bin\jusched.exe
O4 - HKCU\..\Run: [Skype] "C:\Arquivos de programas\Skype\Phone\Skype.exe" /nosplash /minimized
O8 - Extra context menu item: &Pesquisa do Google - res://c:\arquivos de programas\google\GoogleToolbar2.dll/cmsearch.html
O8 - Extra context menu item: &Traduzir palavra em inglês - res://c:\arquivos de programas\google\GoogleToolbar2.dll/cmwordtrans.html
O8 - Extra context menu item: Download all by Free Download Manager - file://C:\Arquivos de programas\Free Download Manager\dlall.htm
O8 - Extra context menu item: Download by Free Download Manager - file://C:\Arquivos de programas\Free Download Manager\dllink.htm
O8 - Extra context menu item: Download selected by Free Download Manager - file://C:\Arquivos de programas\Free Download Manager\dlselected.htm
O8 - Extra context menu item: Download web site by Free Download Manager - file://C:\Arquivos de programas\Free Download Manager\dlpage.htm
O8 - Extra context menu item: E&xportar para o Microsoft Excel - res://C:\ARQUIV~1\MICROS~3\OFFICE11\EXCEL.EXE/3000
O8 - Extra context menu item: Instantâneo da página em cache - res://c:\arquivos de programas\google\GoogleToolbar2.dll/cmcache.html
O8 - Extra context menu item: Links para esta página - res://c:\arquivos de programas\google\GoogleToolbar2.dll/cmbacklinks.html
O8 - Extra context menu item: Páginas semelhantes - res://c:\arquivos de programas\google\GoogleToolbar2.dll/cmsimilar.html
O9 - Extra button: Pesquisar - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\ARQUIV~1\MICROS~3\OFFICE11\REFIEBAR.DLL
O16 - DPF: {1754A1BA-A1DF-4F10-B199-AA55AA1A120F} (InstallerBehaviorFactory Class) - https://signup.msn.com/pages/MsnInstC.cab
O16 - DPF: {2917297F-F02B-4B9D-81DF-494B6333150B} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab31267.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://by113fd.bay113.hotmail.msn.com/resources/MsnPUpld.cab
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsClient.cab31267.cab
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\ARQUIV~1\MSNMES~1\msgrapp.dll" (file missing)
O20 - Winlogon Notify: WRNotifier - WRLogonNTF.dll (file missing)
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - C:\Arquivos de programas\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - Unknown owner - C:\Arquivos de programas\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - C:\Arquivos de programas\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - C:\Arquivos de programas\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\System32\HPZipm12.exe
O23 - Service: SoundMAX Agent Service (SoundMAX Agent Service (default)) - Analog Devices, Inc. - C:\Arquivos de programas\Analog Devices\SoundMAX\SMAgent.exe

MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)
O unico arquivo que fica em vermelho é este em negrito. Ele é um virus?? ou algo d genero?? Pq fica vermelho ??e como exclui-lo, se for necessario??