Help please! je suis envahi!

Voici mon/mes probleme(s) :

Ma connexion internet haut debit est fortement depuis quelques semaines;
Je recois un message avant que mon ordinateur ne redémarre du type (approximativement)

AUTHORITYNT\SYSTEM
C:\Windows\Syst32
Code Etat 128

Je n ai pas eu le temps de tout écrire

Des applications ne fonctionnent plus a certains moment, genre j entends des sons systeme mais plus de sons de fichiers mp3 ou avi...

Quelqu un peut il m aider svp? Gratitude éternelle a vous...

Pouvez vous m indiquer la marche a suivre?

Voici mon log hijackthis



Logfile of HijackThis v1.99.1
Scan saved at 09:02:24, on 14/06/2007
Platform: Windows XP (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 (6.00.2600.0000)

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\LEXBCES.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\LEXPPS.EXE
C:\Program Files\MessengerPlus! 3\MsgPlus.exe
C:\Program Files\Java\jre1.6.0_01\bin\jusched.exe
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccSvcHst.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\WINDOWS\System32\taskmgr.exe
C:\WINDOWS\System32\wuauclt.exe
C:\Program Files\Windows Media Player\wmplayer.exe
C:\Program Files\internet explorer\iexplore.exe
C:\WINDOWS\system32\sol.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\hijackthis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O2 - BHO: (no name) - {00ED30BF-AE9D-402B-9870-6010E3063B2F} - (no file)
O2 - BHO: (no name) - {00F0E0ED-4AA2-48A2-8D2F-33C783F7E6D8} - (no file)
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {111002EE-A816-4AFF-8112-322A02F96BC4} - (no file)
O2 - BHO: (no name) - {182B90A3-F372-438A-800C-6814B4DE417B} - (no file)
O2 - BHO: (no name) - {1892BC05-E58B-482A-809A-09148D615050} - (no file)
O2 - BHO: (no name) - {1C4DC4D5-C35D-4C6A-A793-CE0F9C2B6230} - (no file)
O2 - BHO: (no name) - {2558FF87-C48A-48CA-A155-6A7E24750837} - (no file)
O2 - BHO: (no name) - {268DA700-5D9A-40E7-BE01-0B80AC4F0AB7} - (no file)
O2 - BHO: (no name) - {31A21726-BA5F-4F0C-8940-1FCE1F5E6AF7} - (no file)
O2 - BHO: (no name) - {3D324989-C332-419E-A3E5-F8D791F992ED} - (no file)
O2 - BHO: (no name) - {4389DF4C-C598-40F0-8AF3-F53F48251915} - (no file)
O2 - BHO: (no name) - {49412736-A48B-4FB3-B621-7FE0760584DC} - (no file)
O2 - BHO: (no name) - {4B907082-1399-4F1E-97F3-74422C9D310E} - (no file)
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: (no name) - {55750A24-E09E-4866-AB20-57842DFF94EF} - (no file)
O2 - BHO: (no name) - {56E82107-5928-49B4-BC31-0A8422961D47} - (no file)
O2 - BHO: (no name) - {618E6CE6-9228-4E45-8EF0-E17B8CB059A5} - (no file)
O2 - BHO: (no name) - {65F9CAC1-31BE-4C4D-83F7-768497279AB1} - (no file)
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O2 - BHO: (no name) - {87A7078D-A6A8-44D3-B49F-30540D5C7B15} - (no file)
O2 - BHO: (no name) - {8D209755-07B5-4E52-B49C-98BAB5C93DA1} - (no file)
O2 - BHO: (no name) - {91344C33-E660-498F-9F4B-06120E521692} - (no file)
O2 - BHO: (no name) - {99FD9FBD-4C53-490E-8104-69CE555F6FF2} - (no file)
O2 - BHO: (no name) - {9D3CDB98-3310-4954-98A0-0426E844AF85} - (no file)
O2 - BHO: (no name) - {A022B773-D41E-4648-8E51-F53C1FC5F589} - (no file)
O2 - BHO: (no name) - {A24E7DD6-C5D9-467C-AA8F-036BD547A1E7} - (no file)
O2 - BHO: (no name) - {A87CB501-BC5B-4C25-B84A-EA7E2DAC74A2} - (no file)
O2 - BHO: (no name) - {AF76F784-7050-4BB4-8CC3-0B70BD536C89} - (no file)
O2 - BHO: (no name) - {B2BD4122-1293-4D98-8C06-4B220D0302BD} - (no file)
O2 - BHO: (no name) - {BF011A5B-EDE0-4639-98ED-D9A49470D3F1} - (no file)
O2 - BHO: (no name) - {C38CE96A-619D-494B-95E4-626564611FFC} - (no file)
O2 - BHO: (no name) - {C42D63C1-0B80-409A-A3B8-759B6A0199CF} - (no file)
O2 - BHO: (no name) - {C8BE9D6F-0DAC-4378-BF26-40D68A485379} - (no file)
O2 - BHO: (no name) - {CD3447D4-CA39-4377-8084-30E86331D74C} - (no file)
O2 - BHO: (no name) - {CEB5579E-EFD5-411D-8F02-7139AB4C28FB} - (no file)
O2 - BHO: (no name) - {D32D5FDD-D0DC-4A80-B20A-8D1D9E2732BB} - (no file)
O2 - BHO: (no name) - {EA6C16BD-DDAE-48D0-A6F6-74405835B594} - (no file)
O2 - BHO: (no name) - {ECCE3AE5-AF3E-476A-8718-E52A5DBCD4B2} - (no file)
O2 - BHO: (no name) - {F045F490-1C22-482F-9E6B-94572CACEC5A} - (no file)
O2 - BHO: (no name) - {F167CC57-131C-4838-9A34-62FD1F2999FD} - (no file)
O2 - BHO: (no name) - {F5C19A4C-E29F-45F5-8628-07C94FDF5C10} - (no file)
O2 - BHO: (no name) - {F669EB82-9B43-4043-A323-9B806454DDD0} - (no file)
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [MessengerPlus3] "C:\Program Files\MessengerPlus! 3\MsgPlus.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_01\bin\jusched.exe"
O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Fichiers communs\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [osCheck] "C:\Program Files\Norton AntiVirus\osCheck.exe"
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
O4 - Startup: OpenOffice.org 2.1.lnk = C:\Program Files\OpenOffice.org 2.1\program\quickstart.exe
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra button: PartyPoker.com - {B7FE5D70-9AA2-40F1-9C6B-12A255F085E1} - C:\Program Files\PartyGaming\PartyPoker\RunApp.exe (file missing)
O9 - Extra 'Tools' menuitem: PartyPoker.com - {B7FE5D70-9AA2-40F1-9C6B-12A255F085E1} - C:\Program Files\PartyGaming\PartyPoker\RunApp.exe (file missing)
O16 - DPF: {0EB0E74A-2A76-4AB3-A7FB-9BD8C29F7F75} (CKAVWebScan Object) - https://www.kaspersky.fr/?domain=webscanner.kaspersky.fr
O16 - DPF: {56336BCB-3D8A-11D6-A00B-0050DA18DE71} -
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://v5.windowsupdate.microsoft.com/v5consumer/V5Controls/en/x86/client/wuweb_site.cab?1104712914322
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FICHIE~1\Skype\SKYPE4~1.DLL
O20 - AppInit_DLLs: MsgPlusLoader.dll
O20 - Winlogon Notify: awtsr - C:\WINDOWS\
O20 - Winlogon Notify: ddaba - C:\WINDOWS\
O20 - Winlogon Notify: jkkigge - C:\WINDOWS\
O20 - Winlogon Notify: mljjihe - C:\WINDOWS\
O20 - Winlogon Notify: vturp - C:\WINDOWS\
O23 - Service: AVG Anti-Spyware Guard - GRISOFT s.r.o. - C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: Symantec Lic NetConnect service (CLTNetCnService) - Unknown owner - C:\Program Files\Fichiers communs\Symantec Shared\ccSvcHst.exe" /h cltCommon (file missing)
O23 - Service: Symantec IS Password Validation (ISPwdSvc) - Symantec Corporation - C:\Program Files\Norton AntiVirus\isPwdSvc.exe
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. - C:\WINDOWS\system32\LEXBCES.EXE
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: Symantec Core LC - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\CCPD-LC\symlcsvc.exe