Probleme d'USB infecté qui a infecter PC

Bonjour,
je vient se formater mon PC après un sérieuse infection de virut et braviax. mais j'ai un problem avec USB que je croix qu'il est porteuse de ses infections . voici le rapport de random's system information tool (RSIT)
je croix ke je ss infecter parce la souri fait des double clic et j'ai chercher dans l'USB j'au trouver dans l'autorun
{
[AutoRun]
open=Ljnhwt.bat
shell\open\Command=Ljnhwt.bat
}.
j'ai modifier le nom du fichier indiquer le probleme c'est que je ne trouve pas le fichier dans USB pourle suprimer.

Logfile of random's system information tool 1.06 (written by random/random)
Run by mohammed at 2009-09-04 14:54:44
Microsoft Windows XP Professionnel Service Pack 3
System drive C: has 73 GB (92%) free of 80 GB
Total RAM: 1022 MB (42% free)

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 14:55:13, on 04/09/2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v8.00 (8.00.6001.18702)
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\nvsvc32.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\ATKKBService.exe
C:\PROGRA~1\AVG\AVG8\avgwdsvc.exe
c:\Program Files\Java\jre6\bin\jqs.exe
C:\Program Files\Microsoft\Search Enhancement Pack\SeaPort\SeaPort.exe
C:\PROGRA~1\AVG\AVG8\avgemc.exe
C:\PROGRA~1\AVG\AVG8\avgrsx.exe
C:\PROGRA~1\AVG\AVG8\avgnsx.exe
C:\Program Files\AVG\AVG8\avgcsrvx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\system32\wscntfy.exe
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\Program Files\Fichiers communs\InstallShield\UpdateService\issch.exe
C:\PROGRA~1\AVG\AVG8\avgtray.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\Program Files\LG Electronics\Modem USB LG Electronics\UMAService.exe
C:\Program Files\Windows Live\Messenger\msnmsgr.exe
C:\WINDOWS\system32\rundll32.exe
C:\Program Files\LG Electronics\Modem USB LG Electronics\IEUM.exe
C:\Documents and Settings\mohammed\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\mohammed\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\mohammed\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Program Files\Windows Live\Contacts\wlcomm.exe
C:\Program Files\Skype\Phone\Skype.exe
C:\Documents and Settings\mohammed\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Program Files\Skype\Plugin Manager\skypePM.exe
C:\Documents and Settings\mohammed\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\mohammed\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\mohammed\Bureau\RSIT.exe
C:\Program Files\trend micro\mohammed.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.inwi.ma/
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 Connection Wizard,ShellNext = https://www.inwi.ma/
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: WormRadar.com IESiteBlocker.NavFilter - {3CA2F312-6F6E-4B53-A66E-4E65E497C8C0} - C:\Program Files\AVG\AVG8\avgssie.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Search Helper - {6EBF7485-159F-4bff-A14F-B9E3AAC4465B} - C:\Program Files\Microsoft\Search Enhancement Pack\Search Helper\SearchHelper.dll
O2 - BHO: Programme d'aide de l'Assistant de connexion Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - c:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: Windows Live Toolbar Helper - {E15A8DC0-8516-42A1-81EA-DC94EC1ACF10} - C:\Program Files\Windows Live\Toolbar\wltcore.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - c:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O3 - Toolbar: &Windows Live Toolbar - {21FA44EF-376D-4D53-9B0F-8A89D3229068} - C:\Program Files\Windows Live\Toolbar\wltcore.dll
O4 - HKLM\..\Run: [IMJPMIG8.1] "C:\WINDOWS\IME\imjp8_1\IMJPMIG.EXE" /Spoil /RemAdvDef /Migration32
O4 - HKLM\..\Run: [PHIME2002ASync] C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE /SYNC
O4 - HKLM\..\Run: [PHIME2002A] C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE /IMEName
O4 - HKLM\..\Run: [ISUSPM Startup] C:\PROGRA~1\FICHIE~1\INSTAL~1\UPDATE~1\isuspm.exe -startup
O4 - HKLM\..\Run: [ISUSScheduler] "C:\Program Files\Fichiers communs\InstallShield\UpdateService\issch.exe" -start
O4 - HKLM\..\Run: [GamerOSD] C:\Program Files\ASUS\GamerOSD\GamerOSD.exe
O4 - HKLM\..\Run: [GameFace Messenger] C:\Program Files\GameFace Messenger\GameFace.exe
O4 - HKLM\..\Run: [AVG8_TRAY] C:\PROGRA~1\AVG\AVG8\avgtray.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "c:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [nwiz] C:\Program Files\NVIDIA Corporation\nView\nwiz.exe /install
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [UMService] C:\Program Files\LG Electronics\Modem USB LG Electronics\UMAService.exe
O4 - HKCU\..\Run: [Google Update] "C:\Documents and Settings\mohammed\Local Settings\Application Data\Google\Update\GoogleUpdate.exe" /c
O4 - HKCU\..\Run: [ASUS SmartDoctor] C:\Program Files\ASUS\SmartDoctor\SmartDoctor.exe /start
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\Windows Live\Messenger\msnmsgr.exe" /background
O4 - HKCU\..\Run: [FileHippo.com] "C:\Program Files\FileHippo.com\UpdateChecker.exe" /background
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE RÉSEAU')
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')
O9 - Extra button: Ajout Direct - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra 'Tools' menuitem: &Ajout Direct dans Windows Live Writer - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.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:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O17 - HKLM\System\CCS\Services\Tcpip\..\{3A6C2D69-237F-4A82-83FF-3F96580C80B4}: NameServer = 192.168.50.55 196.12.230.202
O18 - Protocol: linkscanner - {F274614C-63F8-47D5-A4D1-FBDDE494F8D1} - C:\Program Files\AVG\AVG8\avgpp.dll
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FICHIE~1\Skype\SKYPE4~1.DLL
O20 - Winlogon Notify: avgrsstarter - C:\WINDOWS\SYSTEM32\avgrsstx.dll
O23 - Service: ATK Keyboard Service (ATKKeyboardService) - ASUSTeK COMPUTER INC. - C:\WINDOWS\ATKKBService.exe
O23 - Service: AVG Free8 E-mail Scanner (avg8emc) - AVG Technologies CZ, s.r.o. - C:\PROGRA~1\AVG\AVG8\avgemc.exe
O23 - Service: AVG Free8 WatchDog (avg8wd) - AVG Technologies CZ, s.r.o. - C:\PROGRA~1\AVG\AVG8\avgwdsvc.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - c:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe