Les *.exe ne s'execute plus

bonjour a vous,
aucun programme de mon ordi ne veux plus s'executer. g un windows2000pro et voici mon l'erreur qui s'affiche:
"*.exe has generated errors and will be closed by windows. you will need to restart the program. an error log is being created"
et voici mon log:

Logfile of HijackThis v1.99.1
Scan saved at 13:20:17, on 2005-08-16
Platform: Windows 2000 SP4 (WinNT 5.00.2195)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
C:\WINNT\System32\smss.exe
C:\WINNT\system32\winlogon.exe
C:\WINNT\system32\services.exe
C:\WINNT\system32\lsass.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\System32\WBEM\WinMgmt.exe
C:\WINNT\system32\userinit.exe
C:\WINNT\Explorer.EXE
C:\Documents and Settings\Administrator.RECEPTION\My Documents\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.maximizer.com
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.maximizer.com
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer provided by Maximizer Software Inc.
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
R3 - URLSearchHook: (no name) - {8952A998-1E7E-4716-B23D-3DBE03910972} - (no file)
O2 - BHO: (no name) - {87766247-311C-43B4-8499-3D5FEC94A183} - C:\PROGRA~1\COMMON~1\WinTools\WToolsB.dll
O2 - BHO: (no name) - {92998ED8-3537-6F92-1732-1B5346FB5793} - C:\WINNT\system32\byynwfuc.dll
O2 - BHO: ADP UrlCatcher Class - {F4E04583-354E-4076-BE7D-ED6A80FD66DA} - C:\WINNT\system32\msbe.dll
O4 - HKLM\..\Run: [Synchronization Manager] mobsync.exe /logon
O4 - HKLM\..\Run: [WinVNC] "C:\Program Files\RealVNC\WinVNC\winvnc.exe" -servicehelper
O4 - HKLM\..\Run: [secure] C:\WINNT\system32\Vfdutu.exe
O4 - HKLM\..\Run: [HELPER] C:\WINNT\system32\temp532.exe -N
O4 - HKLM\..\Run: [WinTools] C:\PROGRA~1\COMMON~1\WinTools\WToolsA.exe
O4 - HKLM\..\Run: [checkrun] C:\winnt\system32\elitebvk32.exe
O4 - HKLM\..\Run: [System service63] C:\WINNT\etb\pokapoka63.exe
O4 - HKLM\..\Run: [version] C:\WINNT\system32\Cywnim.exe
O4 - HKLM\..\Run: [IST Service] C:\Program Files\ISTsvc\istsvc.exe
O4 - HKLM\..\Run: [Internet Optimizer] "C:\Program Files\Internet Optimizer\optimize.exe"
O4 - HKLM\..\Run: [Media Gateway] C:\Program Files\Media Gateway\MediaGateway.exe
O4 - HKLM\..\Run: [Jnwaksm] C:\Program Files\Jtqw\Qznjq.exe
O4 - HKLM\..\Run: [qp9X36T] cmnodak.exe
O4 - HKLM\..\Run: [salm] c:\temp\salm.exe
O4 - HKLM\..\Run: [utktspml] c:\winnt\utktspml.exe
O4 - Global Startup: Pervasive.SQL Workgroup Engine.lnk = C:\Pvsw\Bin\W3dbsmgr.exe
O4 - Global Startup: HP LaserJet Director.lnk = C:\Program Files\Hewlett-Packard\LaserJet 33xx\hppdirector.exe
O4 - Global Startup: AutoUpdate Monitor.lnk = C:\Program Files\Sophos\AutoUpdate\ALMon.exe
O9 - Extra button: SideFind - {10E42047-DEB9-4535-A118-B3F6EC39B807} - C:\Program Files\SideFind\sidefind.dll
O14 - IERESET.INF: START_PAGE_URL=http://www.maximizer.com
O16 - DPF: {00000000-0000-0000-0000-000020030000} - http://64.237.46.147/it/wmdsms96x.exe
O16 - DPF: {00B71CFB-6864-4346-A978-C0A14556272C} (Checkers Class) - http://messenger.zone.msn.com/binary/msgrchkr.cab
O16 - DPF: {072D3F2E-5FB6-11D3-B461-00C04FA35A21} (CFForm Runtime) - http://www.myrusch.com/CFIDE/classes/CFJava.cab
O16 - DPF: {1D4DB7D2-6EC9-47A3-BD87-1E41684E07BB} - http://ak.imgfarm.com/images/nocache/funwebproducts/ei/SmileyCentralInitialSetup1.0.0.8.exe
O16 - DPF: {1D6711C8-7154-40BB-8380-3DEA45B69CBF} (Web P2P Installer) - http://jpedownload.joltid.com/wi/p2p.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://spaces.msn.com//PhotoUpload/MsnPUpld.cab
O16 - DPF: {5F05A225-0F66-43DE-89E4-6FFD589C4F04} (Download Coach Installer) - http://www.adultpeer.com/install/files/objectCubeInstall.cab
O16 - DPF: {68E53982-CCCE-48C2-89B9-C3C97638F9B4} - http://www.odysseusmarketing.com/actsetup.cab
O16 - DPF: {79849612-A98F-45B8-95E9-4D13C7B6B35C} (Loader2 Control) - http://static.topconverting.com/activex/website.ocx
O16 - DPF: {87067F04-DE4C-4688-BC3C-4FCF39D609E7} - http://download.websearch.com/Dnl/T_50252/QDow_AS2.cab
O16 - DPF: {88D758A3-D33B-45FD-91E3-67749B4057FA} (Sinstaller Class) - http://dm.screensavers.com/dm/installers/si/1/sinstaller.cab
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsClient.cab
O16 - DPF: {9DBAFCCF-592F-FFFF-FFFF-00608CEC297B} - http://downloads.aaa1screensavers.com/download/rist-aug-acx22.exe
O16 - DPF: {9EB320CE-BE1D-4304-A081-4B4665414BEF} (MediaTicketsInstaller Control) - http://www.mt-download.com/MediaTicketsInstaller.cab?refid=3655
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/MsnMessengerSetupDownloader.cab
O16 - DPF: {DDFFA75A-E81D-4454-89FC-B9FD0631E726} - http://www.bundleware.com/activeX/DS3/DS3.cab
O16 - DPF: {EFB22865-F3BC-4309-ADFA-C8E078A7F762} (SysWebTelecomInt Class) - http://www.sponsoradulto.com/fr/SysWebTelecom.cab
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: Domain = quadromed.com
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: Domain = quadromed.com
O17 - HKLM\System\CS2\Services\Tcpip\Parameters: Domain = quadromed.com
O23 - Service: Sophos AutoUpdate Service (ActiveLinkClient) - Unknown owner - C:\Program Files\Sophos\AutoUpdate\ALsvc.exe
O23 - Service: Logical Disk Manager Administrative Service (dmadmin) - VERITAS Software Corp. - C:\WINNT\System32\dmadmin.exe
O23 - Service: MPService - Canon Information Systems - C:\Program Files\Canon\MultiPASS\mpservic.exe
O23 - Service: Sophos Agent - Unknown owner - C:\Program Files\Sophos\Remote Management System\ManagementAgentNT.exe" -service -name Agent (file missing)
O23 - Service: Sophos AutoUpdate Agent - Unknown owner - C:\Program Files\Sophos\Remote Management System\ALCAgent.exe" -service -name ALC (file missing)
O23 - Service: Sophos Message Router - Unknown owner - C:\Program Files\Sophos\Remote Management System\RouterNT.exe" -service -name Router (file missing)
O23 - Service: Sophos Anti-Virus (SWEEPSRV.SYS) - Sophos Plc - C:\Program Files\Sophos\Sophos Anti-Virus\SWEEPSRV.SYS
O23 - Service: WinTools for IE service (WinToolsSvc) - Unknown owner - C:\Program Files\Common Files\WinTools\WToolsS.exe
O23 - Service: VNC Server (winvnc) - Unknown owner - C:\Program Files\RealVNC\WinVNC\winvnc.exe" -service (file missing)
O23 - Service: ZESOFT - Unknown owner - C:\WINNT\zeta.exe

Merci a tous.