Beaucoup de probleme sur ce pc

Bonjour,

je me permet de poster ici un message car la personne qui m'aider pour mon probleme est absente depuis 2 jour et j'ai vraiment besoin d'aide

vous trouverez le message initial et l'historique de mon probleme ici : https://forums.commentcamarche.net/forum/affich-14416028-un-autre-pc-verolle

merci d'avance à celui ou celle qui voudra bien m'aider en recap :

beaucoup de virus et trojans detecter
allumage en mode Diagnostique car sinon impossible de faire quoi que ce soit
dorenavent j'arrive a allumer en mode sans echec
impossible d'installer Antivir donc j'utilise Avast pour le moment

Pour info je n'ai accès a cet ordi que du lundi au vendredi de 9h a 18h30

Merci d'avance pour toute votre aide

PS: Voici le rapport Hijackthis que je viens de faire a l'avance

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 14:10:47, on 25/09/2009
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
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:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\Explorer.EXE
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Documents and Settings\CWS Leonard\Bureau\HiJackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr
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 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: Yahoo! Toolbar avec bloqueur de fenêtres pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
O2 - BHO: Aide pour le lien d'Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: Skype add-on (mastermind) - {22BF413B-C6D2-4d91-82A9-A0F997BA588C} - C:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O8 - Extra context menu item: Add to Windows &Live Favorites - https://onedrive.live.com/?id=favorites
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O8 - Extra context menu item: Ouvrir dans un nouvel onglet d'arrière-plan - res://C:\Program Files\Windows Live Toolbar\Components\fr-fr\msntabres.dll.mui/229?4f1088bafcc04244a459a68904098d0a
O8 - Extra context menu item: Ouvrir dans un nouvel onglet de premier plan - res://C:\Program Files\Windows Live Toolbar\Components\fr-fr\msntabres.dll.mui/230?4f1088bafcc04244a459a68904098d0a
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O9 - Extra button: Skype - {77BF5300-1474-4EC7-9980-D32B190E9B07} - C:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dll
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.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: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} - C:\Program Files\Yahoo!\Common\yinsthelper.dll
O17 - HKLM\System\CCS\Services\Tcpip\..\{276FEDDC-CAF9-4FB1-83CA-F0BCEFC86E39}: NameServer = 192.168.2.1
O18 - Protocol: bw+0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw+0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw-0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw-0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw00 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw00s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw10 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw10s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw20 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw20s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw30 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw30s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw40 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw40s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw50 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw50s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw60 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw60s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw70 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw70s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw80 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw80s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw90 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw90s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwa0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwa0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwb0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwb0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwc0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwc0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwd0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwd0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwe0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwe0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwf0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwf0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwfile-8876480 - {9462A756-7B47-47BC-8C80-C34B9B80B32B} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\GAPlugProtocol-8876480.dll
O18 - Protocol: bwg0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwg0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwh0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwh0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwi0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwi0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwj0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwj0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwk0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwk0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwl0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwl0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwm0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwm0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwn0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwn0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwo0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwo0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwp0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwp0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwq0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwq0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwr0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwr0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bws0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bws0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwt0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwt0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwu0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwu0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwv0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwv0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bww0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bww0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwx0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwx0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwy0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwy0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwz0 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwz0s - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: offline-8876480 - {8CE73396-E7A3-4055-9E08-5F7509895531} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FICHIE~1\Skype\SKYPE4~1.DLL
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.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