Problèmes sous windows

Bonjour,
mes problèmes, qui pour m'aider ? mon ordi arrive en bout de course mais j'aimerais essayer d'améliorer un peu les choses :

- son ne fonctionne plus
- impossible de télécharger n'importe quel fichier
- navigateur internet super lent

j'ai fait hijackthis et voici le résultat

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 19:35:17, on 27.03.08
Platform: Windows 98 SE (Win9x 4.10.2222A)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)
Boot mode: Normal

Running processes:
C:\WINDOWS\SYSTEM\KERNEL32.DLL
C:\WINDOWS\SYSTEM\MSGSRV32.EXE
C:\WINDOWS\SYSTEM\MPREXE.EXE
C:\WINDOWS\SYSTEM\MSTASK.EXE
C:\WINDOWS\SYSTEM\ATI2EVXX.EXE
C:\WINDOWS\EXPLORER.EXE
C:\WINDOWS\TASKMON.EXE
C:\WINDOWS\SYSTEM\SYSTRAY.EXE
C:\MOUSE\SYSTEM\EM_EXEC.EXE
C:\PROGRAM FILES\COMPAQ\EASY ACCESS BUTTON SUPPORT\CPQEADM.EXE
C:\COMPAQ\INTERNET\CISRVR.EXE
C:\CPQS\BWTOOLS\SCCENTER.EXE
C:\WINDOWS\SYSTEM\ATIPTAXX.EXE
C:\PROGRAM FILES\PANDA SOFTWARE\PANDA ANTIVIRUS PLATINUM\APVXDWIN.EXE
C:\WINDOWS\LOADQM.EXE
C:\WINDOWS\SYSTEM\E_S10IC2.EXE
C:\PROGRAM FILES\MYWEBSEARCH\BAR\1.BIN\MWSOEMON.EXE
C:\PROGRAM FILES\FICHIERS COMMUNS\NOKIA\NCLTOOLS\NCLCONF.EXE
C:\WINDOWS\SYSTEM\P2P NETWORKING\P2P NETWORKING.EXE
C:\WINDOWS\SYSTEM\QTTASK.EXE
C:\PROGRAM FILES\COMPAQ\EASY ACCESS BUTTON SUPPORT\BTTNSERV.EXE
C:\WINDOWS\RunDLL.exe
C:\WINDOWS\SYSTEM\SPOOL32.EXE
C:\PROGRAM FILES\FICHIERS COMMUNS\MICROSOFT SHARED\WORKS SHARED\WKCALREM.EXE
C:\PROGRAM FILES\ULTIMATEZIP\UZQKST.EXE
C:\PROGRAM FILES\NIKON\PICTUREPROJECT\NKBMONITOR.EXE
C:\PROGRAM FILES\COMPAQ\EASY ACCESS BUTTON SUPPORT\EAUSBKBD.EXE
C:\WINDOWS\SYSTEM\WMIEXE.EXE
C:\PROGRAM FILES\COMPAQ\ON-SCREEN DISPLAY\OSD.EXE
C:\PROGRAM FILES\PANDA SOFTWARE\PANDA ANTIVIRUS PLATINUM\PAVPROXY.EXE
C:\WINDOWS\SYSTEM\DDHELP.EXE
C:\PROGRAM FILES\TREND MICRO\HIJACKTHIS\HIJACKTHIS.EXE

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://search.presario.net/...
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.google.ch/?gws_rd=ssl
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = http://search.presario.net/...
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://search.presario.net/...
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://fr.yahoo.com/
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://fr.rd.yahoo.com/customize/ie/defaults/su/msgr7/*https://fr.search.yahoo.com/
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\PROGRAM FILES\ADOBE\ACROBAT 5.0\READER\ACTIVEX\ACROIEHELPER.OCX
O2 - BHO: mwsBar BHO - {07B18EA1-A523-4961-B6BB-170DE4475CCA} - C:\PROGRAM FILES\MYWEBSEARCH\BAR\1.BIN\MWSBAR.DLL
O2 - BHO: MyWebSearch Search Assistant BHO - {00A6FAF1-072E-44cf-8957-5838F569A31D} - C:\PROGRAM FILES\MYWEBSEARCH\SRCHASTT\1.BIN\MWSSRCAS.DLL
O2 - BHO: MSNToolBandBHO - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\PROGRAM FILES\MSN APPS\MSN TOOLBAR\01.02.5000.1021\FR-CH\MSNTB.DLL (file missing)
O2 - BHO: ST - {9394EDE7-C8B5-483E-8773-474BF36AF6E4} - C:\PROGRAM FILES\MSN APPS\ST\01.03.0000.1005\EN-XU\STMAIN.DLL (file missing)
O2 - BHO: Need2Find Bar BHO - {4D1C4E81-A32A-416b-BCDB-33B3EF3617D3} - C:\PROGRAM FILES\NEED2FIND\BAR\1.BIN\ND2FNBAR.DLL (file missing)
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\SYSTEM\MSDXM.OCX
O3 - Toolbar: MSN - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\PROGRAM FILES\MSN APPS\MSN TOOLBAR\01.02.5000.1021\FR-CH\MSNTB.DLL (file missing)
O3 - Toolbar: Need2Find Bar - {4D1C4E89-A32A-416b-BCDB-33B3EF3617D3} - C:\PROGRAM FILES\NEED2FIND\BAR\1.BIN\ND2FNBAR.DLL (file missing)
O4 - HKLM\..\Run: [ScanRegistry] c:\windows\scanregw.exe /autorun
O4 - HKLM\..\Run: [TaskMonitor] c:\windows\taskmon.exe
O4 - HKLM\..\Run: [SystemTray] SysTray.Exe
O4 - HKLM\..\Run: [LoadPowerProfile] Rundll32.exe powrprof.dll,LoadCurrentPwrScheme
O4 - HKLM\..\Run: [EnsoniqMixer] starter.exe
O4 - HKLM\..\Run: [EM_EXEC] c:\mouse\system\em_exec.exe
O4 - HKLM\..\Run: [CPQEASYACC] C:\Program Files\Compaq\Easy Access Button Support\cpqeadm.exe
O4 - HKLM\..\Run: [EACLEAN] C:\Program Files\Compaq\Easy Access Button Support\eaclean.exe
O4 - HKLM\..\Run: [Compaq Internet Setup] C:\Compaq\Internet\InetWizard.exe /RUN
O4 - HKLM\..\Run: [CISrvr Program] C:\COMPAQ\INTERNET\CISRVR.EXE
O4 - HKLM\..\Run: [Service Connection] c:\cpqs\bwtools\sccenter.exe
O4 - HKLM\..\Run: [AtiCwd32] Aticwd32.exe
O4 - HKLM\..\Run: [AtiQiPcl] AtiQiPcl.exe
O4 - HKLM\..\Run: [AtiPTA] Atiptaxx.exe
O4 - HKLM\..\Run: [SCANINICIO] "C:\Program Files\Panda Software\Panda Antivirus Platinum\Inicio.exe"
O4 - HKLM\..\Run: [APVXDWIN] "C:\Program Files\Panda Software\Panda Antivirus Platinum\APVXDWIN.EXE" /s
O4 - HKLM\..\Run: [CriticalUpdate] c:\windows\SYSTEM\wucrtupd.exe -startup
O4 - HKLM\..\Run: [LoadQM] loadqm.exe
O4 - HKLM\..\Run: [EPSON Stylus C64 Series] C:\WINDOWS\SYSTEM\E_S10IC2.EXE /P23 "EPSON Stylus C64 Series" /O5 "LPT1:" /M "Stylus C64"
O4 - HKLM\..\Run: [MyWebSearch Email Plugin] C:\PROGRA~1\MYWEBS~1\BAR\1.BIN\MWSOEMON.EXE
O4 - HKLM\..\Run: [Nokia Connection Monitor] "C:\PROGRAM FILES\FICHIERS COMMUNS\NOKIA\NCLTOOLS\NCLCONF.EXE"
O4 - HKLM\..\Run: [msnappau] "c:\program files\MSN Apps\Updater\01.03.0000.1005\fr-ch\msnappau.exe"
O4 - HKLM\..\Run: [OneClick] "C:\Program Files\oneclick\oneclick.exe"
O4 - HKLM\..\Run: [P2P NETWORKING] C:\WINDOWS\SYSTEM\P2P NETWORKING\P2P NETWORKING.EXE /AUTOSTART
O4 - HKLM\..\Run: [AltnetPointsManager] C:\Program Files\Altnet\Points Manager\Points Manager.exe -s
O4 - HKLM\..\Run: [QuickTime Task] "C:\WINDOWS\SYSTEM\QTTASK.EXE" -atboottime
O4 - HKLM\..\RunServices: [LoadPowerProfile] Rundll32.exe powrprof.dll,LoadCurrentPwrScheme
O4 - HKLM\..\RunServices: [SchedulingAgent] mstask.exe
O4 - HKLM\..\RunServices: [HC Reminder] hc.exe
O4 - HKLM\..\RunServices: [PANDASCHEDULER] "C:\Program Files\Panda Software\Panda Antivirus Platinum\Pavsched.exe"
O4 - HKLM\..\RunServices: [PAVFIRES] C:\Program Files\Panda Software\Panda Antivirus Platinum\Firewall\PavFires.exe
O4 - HKLM\..\RunServices: [ATIPOLAB] ati2evxx.exe
O4 - HKCU\..\Run: [MyWebSearch Email Plugin] C:\PROGRA~1\MYWEBS~1\BAR\1.BIN\MWSOEMON.EXE
O4 - HKCU\..\Run: [Yahoo! Pager] C:\Program Files\Yahoo!\Messenger\ypager.exe -quiet
O4 - HKCU\..\Run: [Taskbar Display Controls] RunDLL deskcp16.dll,QUICKRES_RUNDLLENTRY
O4 - HKUS\.DEFAULT\..\Run: [ATI Launchpad] (User 'Default user')
O4 - HKUS\.DEFAULT\..\Run: [MyWebSearch Email Plugin] C:\PROGRA~1\MYWEBS~1\BAR\1.BIN\MWSOEMON.EXE (User 'Default user')
O4 - HKUS\.DEFAULT\..\Run: [Yahoo! Pager] C:\Program Files\Yahoo!\Messenger\ypager.exe -quiet (User 'Default user')
O4 - HKUS\.DEFAULT\..\Run: [Taskbar Display Controls] RunDLL deskcp16.dll,QUICKRES_RUNDLLENTRY (User 'Default user')
O4 - .DEFAULT Startup: Rappels du Calendrier Microsoft Works.lnk = C:\Program Files\Fichiers communs\Microsoft Shared\Works Shared\wkcalrem.exe (User 'Default user')
O4 - .DEFAULT Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office\OSA9.EXE (User 'Default user')
O4 - .DEFAULT Startup: UltimateZip Quick Start.lnk = C:\Program Files\UltimateZip\uzqkst.exe (User 'Default user')
O4 - .DEFAULT Startup: MyWebSearch Email Plugin.lnk = C:\Program Files\MyWebSearch\bar\1.bin\MWSOEMON.EXE (User 'Default user')
O4 - .DEFAULT Startup: NkbMonitor.exe.lnk = C:\Program Files\Nikon\PictureProject\NkbMonitor.exe (User 'Default user')
O4 - Startup: Rappels du Calendrier Microsoft Works.lnk = C:\Program Files\Fichiers communs\Microsoft Shared\Works Shared\wkcalrem.exe
O4 - Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office\OSA9.EXE
O4 - Startup: UltimateZip Quick Start.lnk = C:\Program Files\UltimateZip\uzqkst.exe
O4 - Startup: MyWebSearch Email Plugin.lnk = C:\Program Files\MyWebSearch\bar\1.bin\MWSOEMON.EXE
O4 - Startup: NkbMonitor.exe.lnk = C:\Program Files\Nikon\PictureProject\NkbMonitor.exe
O8 - Extra context menu item: &Search - http://kx.bar.need2find.com/KX/menusearch.html?p=KX
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsClient.cab28578.cab
O16 - DPF: {2917297F-F02B-4B9D-81DF-494B6333150B} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab28578.cab
O16 - DPF: {1D4DB7D2-6EC9-47A3-BD87-1E41684E07BB} - http://ak.imgfarm.com/images/nocache/funwebproducts/ei/SmileyCentralInitialSetup1.0.0.8.cab
O16 - DPF: {00B71CFB-6864-4346-A978-C0A14556272C} (Checkers Class) - http://messenger.zone.msn.com/binary/msgrchkr.cab30149.cab
O16 - DPF: {45E83043-1F6F-4D22-A5E7-0138EA171B49} (FileSharingCtrl Class) - http://appdirectory.messenger.msn.com/AppDirectory/P4Apps/FileSharing/fr/filesharingctrl.cab
O16 - DPF: {D719897A-B07A-4C0C-AEA9-9B663A28DFCB} (iTunesDetector Class) - http://ax.phobos.apple.com.edgesuite.net/detection/ITDetector.cab
O16 - DPF: {018B7EC3-EECA-11D3-8E71-0000E82C6C0D} - http://261.kit.carpediem.fr/sexe-haute-qualite.exe
O16 - DPF: {1E2941E3-8E63-11D4-9D5A-00902742D6E0} (iNotes Class) - http://mail.terrettaz.ch/iNotes.cab
O16 - DPF: {11BD6F81-233F-4B62-BAFB-27ECABD3CBCF} (NTR Activex 1.0.6) - http://www.inquiero.com/inquiero/mod/ntractivex106.cab
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/msnmessengersetupdownloader.cab
O16 - DPF: {01347765-1965-426B-91A4-AA6BB342B9A3} (InstallerObj Class) - http://www.1-click.com/common/files/installer-hidden-test.cab
O16 - DPF: {1D6711C8-7154-40BB-8380-3DEA45B69CBF} (Web P2P Installer) -
O16 - DPF: {B8BE5E93-A60C-4D26-A2DC-220313175592} (ZoneIntro Class) - http://messenger.zone.msn.com/binary/ZIntro.cab32846.cab
O16 - DPF: {14B87622-7E19-4EA8-93B3-97215F77A6BC} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab31267.cab
O16 - DPF: {BD393C14-72AD-4790-A095-76522973D6B8} (CBreakshotControl Class) - http://messenger.zone.msn.com/binary/Bankshot.cab31267.cab
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O16 - DPF: {F5A7706B-B9C0-4C89-A715-7A0C6B05DD48} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab56986.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://gfx2.hotmail.com/mail/w2/pr02/resources/MSNPUpld.cab