Sorte d'exploit

Bonjour,
j'ai un truc bizzare sur mon pc: comme si quelqun le commandait.. je pensair que c'etait un virus et j'ai formaté le dd. Apres j'ai breanché un autre PC sur le routeur et ce truc est maintenant sur le second PC aussi :S. En plus il agit meme qd je suis pas connecté a internet. En fait c des commandes qui sont executés ou des caracteres qui apparaissent pendant que je tape du texte, la calculatrice, media player qui s'ouvrent, IE qui se met en plein écran etc.. Mais les autres PC du reseau connectes par le wifi ne sont pas infectés.. l'antivirus ne detecte rien.. on dirait une sorte d'exploit qui s'installe des qu'on branche un ordi sur le routeur...
J'espere que quelcun porra m'aider, je sais pa quoi faire..

voici les logs de hijackthis (le pc est sur win xp x64 et l'autre etait sur xp pro)
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 14:55:07, on 23.09.2007
Platform: Windows 2003 SP2 (WinNT 5.02.3790)
MSIE: Internet Explorer v7.00 (7.00.6000.16512)
Boot mode: Normal

Running processes:
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\RTHDCPL.EXE
C:\WINDOWS\SysWOW64\ctfmon.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\WINDOWS\ALCFDRTM.EXE
C:\Program Files (x86)\Alcohol Soft\Alcohol 120\StarWind\StarWindService.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files (x86)\Trend Micro\HijackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://fr.search.yahoo.com/?fr=altavista
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
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.avast.com/store?verb=register-home&lang=rus
F2 - REG:system.ini: UserInit=userinit
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files (x86)\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [StartCCC] C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\RunOnce: [TSClientMSIUninstaller] cmd.exe /C "cscript %systemroot%\Installer\TSClientMsiTrans\tscuinst.vbs"
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-19\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'NETWORK SERVICE')
O4 - HKUS\S-1-5-20\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'NETWORK SERVICE')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - HKUS\.DEFAULT\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'Default user')
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
O12 - Plugin for .spop: C:\Program Files (x86)\Internet Explorer\Plugins\NPDocBox.dll
O15 - ESC Trusted Zone: http://runonce.msn.com
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://www.update.microsoft.com/...
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://www.update.microsoft.com/...
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINDOWS\system32\Ati2evxx.exe (file missing)
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2saag.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: Logical Disk Manager Administrative Service (dmadmin) - Unknown owner - C:\WINDOWS\System32\dmadmin.exe (file missing)
O23 - Service: Event Log (Eventlog) - Unknown owner - C:\WINDOWS\system32\services.exe (file missing)
O23 - Service: HTTP SSL (HTTPFilter) - Unknown owner - C:\WINDOWS\System32\lsass.exe (file missing)
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files (x86)\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: IMAPI CD-Burning COM Service (ImapiService) - Unknown owner - C:\WINDOWS\system32\imapi.exe (file missing)
O23 - Service: Distributed Transaction Coordinator (MSDTC) - Unknown owner - C:\WINDOWS\system32\msdtc.exe (file missing)
O23 - Service: Net Logon (Netlogon) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: NT LM Security Support Provider (NtLmSsp) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: Plug and Play (PlugPlay) - Unknown owner - C:\WINDOWS\system32\services.exe (file missing)
O23 - Service: IPSEC Services (PolicyAgent) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: Protected Storage (ProtectedStorage) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: Remote Desktop Help Session Manager (RDSessMgr) - Unknown owner - C:\WINDOWS\system32\sessmgr.exe (file missing)
O23 - Service: Security Accounts Manager (SamSs) - Unknown owner - C:\WINDOWS\system32\lsass.exe (file missing)
O23 - Service: StarWind iSCSI Service (StarWindService) - Rocket Division Software - C:\Program Files (x86)\Alcohol Soft\Alcohol 120\StarWind\StarWindService.exe
O23 - Service: Virtual Disk Service (vds) - Unknown owner - C:\WINDOWS\System32\vds.exe (file missing)
O23 - Service: Volume Shadow Copy (VSS) - Unknown owner - C:\WINDOWS\System32\vssvc.exe (file missing)
O23 - Service: WMI Performance Adapter (WmiApSrv) - Unknown owner - C:\WINDOWS\system32\wbem\wmiapsrv.exe (file missing)