mon pc lag beaucoup et je ne sai plus quoi faire

j'ai recement formater mon pc, depuis, il n'arrete pas de laguer (notamment avec l'affichage des pages web), mais il a egalmnt une fachuse tendence a se deconnecter tout seul d'internet toute les 5 secondes (alors que tout m'indique que je suis connecté)... j'ai fai un log hijackthis mais je ne sais pas du tout comment l'interpreter... aidez moi svp !!


Logfile of HijackThis v1.99.1
Scan saved at 23:10:32, on 03/07/2005
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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\System32\Netlib.exe
C:\Program Files\Fichiers communs\Softwin\BitDefender Communicator\xcommsvr.exe
C:\Program Files\Fichiers communs\Softwin\BitDefender Scan Server\bdss.exe
C:\Program Files\Softwin\BitDefender8\vsserv.exe
C:\WINDOWS\system32\wscntfy.exe
C:\WINDOWS\system32\mouse.exe
C:\WINDOWS\system32\phqghum.exe
C:\Program Files\Java\jre1.5.0_04\bin\jusched.exe
C:\Program Files\Softwin\BitDefender8\bdmcon.exe
C:\Program Files\Softwin\BitDefender8\bdoesrv.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Program Files\Softwin\BitDefender8\bdswitch.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\rcoc\eeoe.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\WINDOWS\system32\taskmgr.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\WINDOWS\system32\d?xplore.exe
C:\Documents and Settings\famille le bail\Bureau\a2personalsetup.exe
C:\DOCUME~1\FAMILL~1\LOCALS~1\Temp\is-J05JH.tmp\is-4JPUL.tmp
C:\Program Files\a2\a2upd.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\WinRAR\WinRAR.exe
C:\DOCUME~1\FAMILL~1\LOCALS~1\Temp\Rar$EX00.047\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.fr/
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: (no name) - _{CFBFAE00-17A6-11D0-99CB-00C04FD64497} - (no file)
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll
O2 - BHO: (no name) - {B3AFE59D-217F-03D3-0EC7-7EC2799E7CC6} - C:\WINDOWS\System32\ybicmdk.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll
O4 - HKLM\..\Run: [mouse] mouse.exe
O4 - HKLM\..\Run: [MSN8m Startup] msn8m.exe
O4 - HKLM\..\Run: [Sygate Personal Firewall] Sygat.exe
O4 - HKLM\..\Run: [Microsoft Update] sys.exe
O4 - HKLM\..\Run: [Popup Blocker System8 Monitoring] PopUpBlocker8.exe
O4 - HKLM\..\Run: [regedit] autoexe.exe
O4 - HKLM\..\Run: [VIEW POINT DRIVERS] phqghum.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0_04\bin\jusched.exe
O4 - HKLM\..\Run: [BDMCon] C:\Program Files\Softwin\BitDefender8\\bdmcon.exe
O4 - HKLM\..\Run: [BDOESRV] C:\Program Files\Softwin\BitDefender8\\bdoesrv.exe
O4 - HKLM\..\Run: [BDNewsAgent] C:\Program Files\Softwin\BitDefender8\\bdnagent.exe
O4 - HKLM\..\Run: [BDSwitchAgent] C:\Program Files\Softwin\BitDefender8\\bdswitch.exe
O4 - HKLM\..\Run: [IST Service] C:\Program Files\ISTsvc\istsvc.exe
O4 - HKLM\..\RunServices: [mouse] mouse.exe
O4 - HKLM\..\RunServices: [MSN8m Startup] msn8m.exe
O4 - HKLM\..\RunServices: [Sygate Personal Firewall] Sygat.exe
O4 - HKLM\..\RunServices: [Microsoft Update] sys.exe
O4 - HKLM\..\RunServices: [Popup Blocker System8 Monitoring] PopUpBlocker8.exe
O4 - HKLM\..\RunServices: [regedit] autoexe.exe
O4 - HKLM\..\RunServices: [VIEW POINT DRIVERS] phqghum.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [VIEW POINT DRIVERS] phqghum.exe
O4 - HKCU\..\Run: [Csru] C:\Program Files\rcoc\eeoe.exe
O4 - HKCU\..\Run: [Lxhut] C:\WINDOWS\System32\d?xplore.exe
O4 - HKCU\..\Run: [a-squared] "C:\Program Files\a2\a2guard.exe"
O8 - Extra context menu item: &Google Search - res://C:\Program Files\Google\GoogleToolbar1.dll/cmsearch.html
O8 - Extra context menu item: Pages liées - res://C:\Program Files\Google\GoogleToolbar1.dll/cmbacklinks.html
O8 - Extra context menu item: Pages similaires - res://C:\Program Files\Google\GoogleToolbar1.dll/cmsimilar.html
O8 - Extra context menu item: Version de la page actuelle disponible dans le cache Google - res://C:\Program Files\Google\GoogleToolbar1.dll/cmcache.html
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls...
O16 - DPF: {74D05D43-3236-11D4-BDCD-00C04F9A3B61} (HouseCall Control) - http://a840.g.akamai.net/7/840/537/2004061001/housecall...
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/msnmessengersetupdown...
O17 - HKLM\System\CCS\Services\Tcpip\..\{ABD0716F-F8F5-4B95-9995-19042A595625}: NameServer = 80.118.196.40 80.118.192.110
O23 - Service: BitDefender Scan Server (bdss) - Unknown owner - C:\Program Files\Fichiers communs\Softwin\BitDefender Scan Server\bdss.exe" /service (file missing)
O23 - Service: Net Functions Library (Netlib) - Unknown owner - C:\WINDOWS\System32\Netlib.exe
O23 - Service: BitDefender Virus Shield (VSSERV) - Unknown owner - C:\Program Files\Softwin\BitDefender8\vsserv.exe" /service (file missing)
O23 - Service: BitDefender Communicator (XCOMM) - Unknown owner - C:\Program Files\Fichiers communs\Softwin\BitDefender Communicator\xcommsvr.exe" /service (file missing)