Virus trojan downloader purityscan HELP

Bonjour,

J'ai besoin d'un coup de pouce s.v.p

Mon PC est infecté, je n'ai meme plus de son.

voici l'analyse effectuée avec Hijack:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 13.04.15, on 10/03/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16608)
Boot mode: Normal

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:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
C:\Programmi\TOSHIBA\ConfigFree\CFSvcs.exe
C:\WINDOWS\system32\CTsvcCDA.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\hkcmd.exe
C:\WINDOWS\system32\igfxpers.exe
C:\WINDOWS\AGRSMMSG.exe
C:\Programmi\Apoint2K\Apoint.exe
C:\Programmi\TOSHIBA\E-KEY\CeEKey.exe
C:\Programmi\TOSHIBA\TouchPad\TPTray.exe
C:\WINDOWS\system32\ZoomingHook.exe
C:\WINDOWS\system32\TCtrlIOHook.exe
C:\Programmi\TOSHIBA\TOSHIBA Zooming Utility\SmoothView.exe
C:\Programmi\TOSHIBA\TOSHIBA Controls\TFncKy.exe
C:\Programmi\TOSHIBA\Touch and Launch\PadExe.exe
C:\Programmi\TOSHIBA\Tvs\TvsTray.exe
C:\Programmi\TOSHIBA\ConfigFree\NDSTray.exe
C:\Programmi\TOSHIBA\ConfigFree\CFSServ.exe
C:\Programmi\Apoint2K\Apntex.exe
C:\WINDOWS\system32\rundll32.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe
C:\Programmi\Samsung\Samsung Media Studio 5\SMSTray.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\system32\TPSBattM.exe
C:\Programmi\TOSHIBA\TOSCDSPD\toscdspd.exe
C:\Programmi\File comuni\Ahead\lib\NMBgMonitor.exe
C:\Programmi\Skype\Phone\Skype.exe
C:\WINDOWS\system32\rundll32.exe
C:\Programmi\Creative\Sync Manager Unicode\CTSyncU.exe
C:\Programmi\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
C:\Programmi\Toshiba\Bluetooth Toshiba Stack\TosBtMng.exe
C:\Programmi\TOSHIBA\ConfigFree\CFXFER.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\Programmi\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = https://www.bing.com/?FORM=TOOLBR&cc=it&toHttps=1&redig=D0EF743F7F6C4B359966A07C27E84952
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.bing.com/?FORM=TOOLBR&cc=it&toHttps=1&redig=D0EF743F7F6C4B359966A07C27E84952
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr/?ocid=iehp
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr/?ocid=iehp
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = https://www.bing.com/?FORM=TOOLBR&cc=it&toHttps=1&redig=D0EF743F7F6C4B359966A07C27E84952
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
R3 - URLSearchHook: Yahoo! Toolbar con blocco Pop-Up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programmi\Yahoo!\Companion\Installs\cpn\yt.dll
F2 - REG:system.ini: UserInit=C:\WINDOWS\system32\Userinit.exe
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:\Programmi\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\programmi\google\googletoolbar3.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Programmi\Google\GoogleToolbarNotifier\2.0.301.7164\swg.dll
O2 - BHO: MSN Search Toolbar Helper - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\MSN Toolbar Suite\TB\02.05.0000.1082\it-it\msntb.dll
O3 - Toolbar: MSN Search Toolbar - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\MSN Toolbar Suite\TB\02.05.0000.1082\it-it\msntb.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\programmi\google\googletoolbar3.dll
O3 - Toolbar: Yahoo! Toolbar con blocco Pop-Up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programmi\Yahoo!\Companion\Installs\cpn\yt.dll
O4 - HKLM\..\Run: [igfxtray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [igfxhkcmd] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [igfxpers] C:\WINDOWS\system32\igfxpers.exe
O4 - HKLM\..\Run: [AGRSMMSG] AGRSMMSG.exe
O4 - HKLM\..\Run: [Apoint] C:\Programmi\Apoint2K\Apoint.exe
O4 - HKLM\..\Run: [CeEKEY] C:\Programmi\TOSHIBA\E-KEY\CeEKey.exe
O4 - HKLM\..\Run: [TPNF] C:\Programmi\TOSHIBA\TouchPad\TPTray.exe
O4 - HKLM\..\Run: [HWSetup] C:\Programmi\TOSHIBA\TOSHIBA Applet\HWSetup.exe hwSetUP
O4 - HKLM\..\Run: [SVPWUTIL] C:\Programmi\Toshiba\Windows Utilities\SVPWUTIL.exe SVPwUTIL
O4 - HKLM\..\Run: [Zooming] ZoomingHook.exe
O4 - HKLM\..\Run: [TCtryIOHook] TCtrlIOHook.exe
O4 - HKLM\..\Run: [TPSMain] TPSMain.exe
O4 - HKLM\..\Run: [SmoothView] C:\Programmi\TOSHIBA\TOSHIBA Zooming Utility\SmoothView.exe
O4 - HKLM\..\Run: [TFncKy] TFncKy.exe
O4 - HKLM\..\Run: [PadTouch] C:\Programmi\TOSHIBA\Touch and Launch\PadExe.exe
O4 - HKLM\..\Run: [Tvs] C:\Programmi\TOSHIBA\Tvs\TvsTray.exe
O4 - HKLM\..\Run: [NDSTray.exe] NDSTray.exe
O4 - HKLM\..\Run: [CFSServ.exe] CFSServ.exe -NoClient
O4 - HKLM\..\Run: [NeroFilterCheck] C:\Programmi\File comuni\Ahead\Lib\NeroCheck.exe
O4 - HKLM\..\Run: [BluetoothAuthenticationAgent] rundll32.exe bthprops.cpl,,BluetoothAuthenticationAgent
O4 - HKLM\..\Run: [AVG7_CC] C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe /STARTUP
O4 - HKLM\..\Run: [SMSTray] C:\Programmi\Samsung\Samsung Media Studio 5\SMSTray.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [TOSCDSPD] C:\Programmi\TOSHIBA\TOSCDSPD\toscdspd.exe
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Programmi\File comuni\Ahead\lib\NMBgMonitor.exe"
O4 - HKCU\..\Run: [Skype] "C:\Programmi\Skype\Phone\Skype.exe" /nosplash /minimized
O4 - HKCU\..\Run: [Instant Access] rundll32.exe EGACCESS4_1064.dll,InstantAccess
O4 - HKCU\..\Run: [CTSyncU.exe] "C:\Programmi\Creative\Sync Manager Unicode\CTSyncU.exe"
O4 - HKCU\..\Run: [swg] C:\Programmi\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVIZIO LOCALE')
O4 - HKUS\S-1-5-19\..\Run: [AVG7_Run] C:\PROGRA~1\Grisoft\AVGFRE~1\avgw.exe /RUNONCE (User 'SERVIZIO LOCALE')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVIZIO DI RETE')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - Startup: Microsoft Office OneNote 2003 Quick Launch.lnk = C:\Programmi\Microsoft Office\OFFICE11\ONENOTEM.EXE
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Programmi\File comuni\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Avvio veloce di Adobe Reader.lnk = C:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: Bluetooth Manager.lnk = ?
O8 - Extra context menu item: &MSN Search - res://C:\Programmi\MSN Toolbar Suite\TB\02.05.0000.1082\it-it\msntb.dll/search.htm
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_03\bin\npjpi150_03.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_03\bin\npjpi150_03.dll
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O16 - DPF: {04F414E9-E352-4BC3-963D-7BFE5A5F31A9} - http://scripts.dlv4.com/binaries/egaccess4/egaccess4_1064_XP.cab
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (YInstStarter Class) - C:\Programmi\Yahoo!\Common\yinsthelper.dll
O16 - DPF: {74D05D43-3236-11D4-BDCD-00C04F9A3B61} (HouseCall Control) - https://www.trendmicro.com/en_us/forHome/products/housecall.html
O17 - HKLM\System\CCS\Services\Tcpip\..\{69B23F01-C004-4AE1-A637-2A35E9693FA4}: NameServer = 10.0.0.1
O23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
O23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
O23 - Service: AVG E-mail Scanner (AVGEMS) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
O23 - Service: ConfigFree Service (CFSvcs) - TOSHIBA CORPORATION - C:\Programmi\TOSHIBA\ConfigFree\CFSvcs.exe
O23 - Service: Creative Service for CDROM Access - Creative Technology Ltd - C:\WINDOWS\system32\CTsvcCDA.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Programmi\Google\Common\Google Updater\GoogleUpdaterService.exe