Virus, spyware ...

Bonjour tout le monde, j'aimerai savoir quel est le meilleur antivirus et le firewall qui va avec? Je crois que j'ai du en tester une dixaine et on dirait que je passe ma vie a les combattre.
merci de me répondre.
De plus mon ordi buug parfois
voici mon hijack:

Logfile of HijackThis v1.99.1
Scan saved at 15:28:40, on 27/08/2005
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
I:\WINDOWS\System32\smss.exe
I:\WINDOWS\system32\winlogon.exe
I:\WINDOWS\system32\services.exe
I:\WINDOWS\system32\lsass.exe
I:\WINDOWS\system32\svchost.exe
I:\WINDOWS\System32\svchost.exe
I:\WINDOWS\system32\spoolsv.exe
I:\WINDOWS\Explorer.EXE
I:\Program Files\Microsoft AntiSpyware\gcasServ.exe
I:\Program Files\Eset\nod32kui.exe
I:\Program Files\Microsoft AntiSpyware\gcasDtServ.exe
I:\Program Files\Zone Labs\ZoneAlarm\zlclient.exe
I:\Program Files\Eset\nod32krn.exe
I:\WINDOWS\System32\nvsvc32.exe
I:\WINDOWS\System32\svchost.exe
I:\WINDOWS\system32\ZoneLabs\vsmon.exe
I:\Program Files\Mozilla Firefox\firefox.exe
I:\Documents and Settings\cédric\Bureau\Nouveau dossier\Nouveau dossier\HijackThis-1.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.fr/
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = NUMERICABLE
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: Yahoo! Companion BHO - {02478D38-C3F9-4efb-9B51-7695ECA05670} - I:\PROGRA~1\Yahoo!\COMPAN~1\Installs\cpn\ycomp5_3_18_0.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - I:\Program Files\Spybot - Search & Destroy\SDHelper.dll
O3 - Toolbar: &Yahoo! Companion - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - I:\PROGRA~1\Yahoo!\COMPAN~1\Installs\cpn\ycomp5_3_18_0.dll
O4 - HKLM\..\Run: [gcasServ] "I:\Program Files\Microsoft AntiSpyware\gcasServ.exe"
O4 - HKLM\..\Run: [Look 'n' Stop] "I:\Program Files\Soft4Ever\looknstop\looknstop.exe" -auto
O4 - HKLM\..\Run: [nod32kui] "I:\Program Files\Eset\nod32kui.exe" /WAITSERVICE
O4 - HKLM\..\RunServices: [MS Unix Binary] msnq3insller.exe
O4 - HKLM\..\RunServices: [Registry Value Name] sysmanxt.exe
O4 - HKLM\..\RunServices: [Win32 USB2 Driver] f5r2.exe
O16 - DPF: {2917297F-F02B-4B9D-81DF-494B6333150B} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab31267.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1120830344371
O16 - DPF: {74D05D43-3236-11D4-BDCD-00C04F9A3B61} (HouseCall Control) - http://a840.g.akamai.net/7/840/537/2004061001/housecall.trendmicro.com/housecall/xscan53.cab
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsClient.cab31267.cab
O23 - Service: MAPI Mail Client (MAPI) - Unknown owner - I:\WINDOWS\system32\yyy.exe (file missing)
O23 - Service: NOD32 Kernel Service (NOD32krn) - Unknown owner - I:\Program Files\Eset\nod32krn.exe
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - I:\WINDOWS\System32\nvsvc32.exe
O23 - Service: systemboot - Unknown owner - I:\WINDOWS\system.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs, LLC - I:\WINDOWS\system32\ZoneLabs\vsmon.exe

merci d'avance