Reinitialiser ordi oui ou non?

Bonjour,
Je demanderai de l'aide pour mon ordi. Je voudrais remettre mon ordi a zero. Il gele souvent...
Et aussi le disque local est souvent dans rouge: 232 go
Mon ordi date avril 2007, il a eu simplement des nettoyages de disques, des defragmentaires de disque, des scan de virus...mais je voudrais plus
J'ai déjà sauvegarder toute mes fichiers précieux sur des CD donc pas de probleme pour toute effacer.
J'ai TOUTES les CD-ROM de reinstallation.

J'ai lancé le "HijackThis"...si ça peut vous aider

Logfile of HijackThis v1.99.1
Scan saved at 19:21:06, on 2007-09-25
Platform: Unknown Windows (WinNT 6.00.1904)
MSIE: Internet Explorer v7.00 (7.00.6000.16512)

Running processes:
C:\Windows\system32\taskeng.exe
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Program Files\Windows Defender\MSASCui.exe
C:\Program Files\CA\CA Internet Security Suite\cctray\cctray.exe
C:\Program Files\CA\CA Internet Security Suite\CA Anti-Virus\cavrid.exe
C:\Program Files\Common Files\Roxio Shared\9.0\SharedCOM\RoxWatchTray9.exe
C:\Program Files\Common Files\InstallShield\UpdateService\issch.exe
C:\Program Files\Dell AIO 810\dlcgmon.exe
C:\Program Files\Java\jre1.6.0_02\bin\jusched.exe
C:\Windows\ehome\ehtray.exe
C:\Program Files\Windows Live\Messenger\msnmsgr.exe
C:\Program Files\MétéoMédia\MétéoIMédia\WeatherEye.exe
C:\Program Files\Veoh Networks\Veoh\VeohClient.exe
C:\Windows\ehome\ehmsas.exe
C:\Program Files\Windows Media Player\wmpnscfg.exe
C:\Program Files\Google\Google Updater\GoogleUpdater.exe
C:\Program Files\Common Files\Roxio Shared\9.0\SharedCOM\CPSHelpRunner.exe
C:\Windows\system32\wbem\unsecapp.exe
C:\Program Files\Windows Live\Messenger\msnmsgr.exe
C:\Windows\system32\wuauclt.exe
C:\Program Files\Internet Explorer\IEUser.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Hijackthis Version Française\hijackthis vf.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://qc.yahoo.com/
R3 - URLSearchHook: Yahoo! Toolbar avec bloqueur de fenêtres pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
R3 - URLSearchHook: SweetIM For Internet Explorer - {BC4FFE41-DE9F-46fa-B455-AAD49B9F9938} - C:\Program Files\Macrogaming\SweetIMBarForIE\toolbar.dll
O1 - Hosts: ::1 localhost
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: XBTB03021 - {0C0E5FD9-B58D-4321-BA3B-6620E7565C22} - C:\PROGRA~1\FREEZE~1.COM\FREEZE~1.DLL
O2 - BHO: SWEETIE - {1A0AADCD-3A72-4b5f-900F-E3BB5A838E2A} - C:\PROGRA~1\MACROG~1\SWEETI~1\toolbar.dll
O2 - BHO: BitComet ClickCapture - {39F7E362-828A-4B5A-BCAF-5B79BFDFEA60} - C:\Program Files\BitComet\tools\BitCometBHO_1.1.7.4.dll
O2 - BHO: Altavista Toolbar - {4E7BD74F-2B8D-469E-92EA-EC65A294AE31} - C:\PROGRA~1\ALTAVI~1\ALTAVI~1.DLL
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_02\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar2.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\2.1.615.5858\swg.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar2.dll
O3 - Toolbar: Yahoo! Toolbar avec bloqueur de fenêtres pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O3 - Toolbar: Veoh Browser Plug-in - {D0943516-5076-4020-A3B5-AEFAF26AB263} - C:\Program Files\Veoh Networks\Veoh\Plugins\reg\VeohToolbar.dll
O3 - Toolbar: SweetIM For Internet Explorer - {BC4FFE41-DE9F-46fa-B455-AAD49B9F9938} - C:\Program Files\Macrogaming\SweetIMBarForIE\toolbar.dll
O3 - Toolbar: Freeze.com Toolbar - {B7D3E479-CC68-42B5-A338-938ECE35F419} - C:\Program Files\Freeze.com Toolbar\freeze_int.dll
O3 - Toolbar: Altavista Toolbar - {4E7BD74F-2B8D-469E-92EA-EC65A294AE31} - C:\PROGRA~1\ALTAVI~1\ALTAVI~1.DLL
O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
O4 - HKLM\..\Run: [cctray] "C:\Program Files\CA\CA Internet Security Suite\cctray\cctray.exe"
O4 - HKLM\..\Run: [CAVRID] "C:\Program Files\CA\CA Internet Security Suite\CA Anti-Virus\CAVRID.exe"
O4 - HKLM\..\Run: [RoxWatchTray] "C:\Program Files\Common Files\Roxio Shared\9.0\SharedCOM\RoxWatchTray9.exe"
O4 - HKLM\..\Run: [ISUSPM Startup] C:\PROGRA~1\COMMON~1\INSTAL~1\UPDATE~1\ISUSPM.exe -startup
O4 - HKLM\..\Run: [ISUSScheduler] "C:\Program Files\Common Files\InstallShield\UpdateService\issch.exe" -start
O4 - HKLM\..\Run: [DLCGCATS] rundll32 C:\Windows\system32\spool\DRIVERS\W32X86\3\DLCGtime.dll,_RunDLLEntry@16
O4 - HKLM\..\Run: [dlcgmon.exe] "C:\Program Files\Dell AIO 810\dlcgmon.exe"
O4 - HKLM\..\Run: [FaxCenterServer] "C:\Program Files\Dell Fax Solutions\fm3032.exe" /s
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_02\bin\jusched.exe"
O4 - HKCU\..\Run: [ehTray.exe] C:\Windows\ehome\ehTray.exe
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\Windows Live\Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [MétéoIMédia] C:\Program Files\MétéoMédia\MétéoIMédia\WeatherEye
O4 - HKCU\..\Run: [Veoh] "C:\Program Files\Veoh Networks\Veoh\VeohClient.exe" /VeohHide
O4 - HKCU\..\Run: [WMPNSCFG] C:\Program Files\Windows Media Player\WMPNSCFG.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE
O4 - Global Startup: Outil de mise à jour Google.lnk = C:\Program Files\Google\Google Updater\GoogleUpdater.exe
O8 - Extra context menu item: &D&ownload &with BitComet - res://C:\Program Files\BitComet\BitComet.exe/AddLink.htm
O8 - Extra context menu item: &D&ownload all video with BitComet - res://C:\Program Files\BitComet\BitComet.exe/AddVideo.htm
O8 - Extra context menu item: &D&ownload all with BitComet - res://C:\Program Files\BitComet\BitComet.exe/AddAllLink.htm
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Recherche AltaVista - file://C:\Users\Carole\AppData\LocalLow\ALTAVISTA\SelectedContextSearch_Recherche AltaVista.htm
O8 - Extra context menu item: Traduction - file://C:\Users\Carole\AppData\LocalLow\ALTAVISTA\SelectedContextTranslation.htm
O9 - Extra button: BitComet Search - {461CC20B-FB6E-4f16-8FE8-C29359DB100E} - C:\Program Files\BitComet\tools\BitCometBHO_1.1.7.4.dll
O9 - Extra button: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file missing)
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner v8 - {85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file missing)
O9 - Extra button: (no name) - {B205A35E-1FC4-4CE3-818B-899DBBB3388C} - C:\Program Files\Common Files\Microsoft Shared\Encarta Search Bar\ENCSBAR.DLL
O10 - Unknown file in Winsock LSP: c:\windows\system32\nlaapi.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\napinsp.dll
O11 - Options group: [INTERNATIONAL] International*
O13 - Gopher Prefix:
O16 - DPF: {512FC5A1-7DE1-43F1-BC0C-371622FCB409} (TotalScan Installer Class) - https://www.pandasecurity.com/en/homeusers/online-antivirus/?ref=activescan
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} (BDSCANONLINE Control) - http://www.bitdefender.fr/scan_fr/scan8/oscan8.cab
O16 - DPF: {8436FE12-31DB-48BF-83BF-FE682F9160B4} (NanoInstaller Class) - https://www.pandasecurity.com/en/homeusers/online-antivirus/?ref=activescan
O17 - HKLM\System\CCS\Services\Tcpip\..\{18366273-0A86-40AB-904F-570578FAE2D3}: NameServer = 142.169.1.16,205.151.69.200
O17 - HKLM\System\CS1\Services\Tcpip\..\{18366273-0A86-40AB-904F-570578FAE2D3}: NameServer = 142.169.1.16,205.151.69.200
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\WI1F86~1\MESSEN~1\MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\WI1F86~1\MESSEN~1\MSGRAP~1.DLL
O23 - Service: CaCCProvSP - CA, Inc. - C:\Program Files\CA\CA Internet Security Suite\ccprovsp.exe
O23 - Service: CAISafe - Computer Associates International, Inc. - C:\Program Files\CA\CA Internet Security Suite\CA Anti-Virus\ISafe.exe
O23 - Service: dlcg_device - - C:\Windows\system32\dlcgcoms.exe
O23 - Service: @%SystemRoot%\ehome\ehstart.dll,-101 (ehstart) - Unknown owner - %windir%\system32\svchost.exe (file missing)
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Roxio\Roxio MyDVD DE\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: My Web Search Service (MyWebSearchService) - Unknown owner - C:\PROGRA~1\MYWEBS~1\bar\1.bin\mwssvc.exe (file missing)
O23 - Service: @%SystemRoot%\system32\qwave.dll,-1 (QWAVE) - Unknown owner - %windir%\system32\svchost.exe (file missing)
O23 - Service: RoxMediaDB9 - Sonic Solutions - C:\Program Files\Common Files\Roxio Shared\9.0\SharedCOM\RoxMediaDB9.exe
O23 - Service: Roxio Hard Drive Watcher 9 (RoxWatch9) - Sonic Solutions - C:\Program Files\Common Files\Roxio Shared\9.0\SharedCOM\RoxWatch9.exe
O23 - Service: @%SystemRoot%\system32\seclogon.dll,-7001 (seclogon) - Unknown owner - %windir%\system32\svchost.exe (file missing)
O23 - Service: stllssvr - MicroVision Development, Inc. - C:\Program Files\Common Files\SureThing Shared\stllssvr.exe
O23 - Service: VET Message Service (VETMSGNT) - CA, Inc. - C:\Program Files\CA\CA Internet Security Suite\CA Anti-Virus\VetMsg.exe
O23 - Service: Windows Live Setup Service (WLSetupSvc) - Unknown owner - C:\Program Files\Windows Live\installer\WLSetupSvc.exe
O23 - Service: @%ProgramFiles%\Windows Media Player\wmpnetwk.exe,-101 (WMPNetworkSvc) - Unknown owner - %ProgramFiles%\Windows Media Player\wmpnetwk.exe (file missing)

MERCI d'avance