[lenteur windows xp]

bonjour,
depuis qq temps mon pc est tres lent : l'ouverture de l'explorateur par exemple prend plusieurs minutes...
j'ai defragmente tous mes lecteurs, fait un scan antivirus mais rien ne change.
j'ai donc scanne avec hijackthis mais j'aimerais avoir des conseils par rapport aux resultats (joints a la fin de mon message).
quelqu'un peut-il m'aider?
Merci a tous...

Logfile of HijackThis v1.97.7
Scan saved at 15:20:41, on 03/08/2006
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

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\spoolsv.exe
D:\Program Files\Adobe\Photoshop Elements 3.0\PhotoshopElementsFileAgent.exe
j:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
j:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\System32\drivers\CDAC11BA.EXE
C:\WINDOWS\System32\nvsvc32.exe
d:\Program Files\Kerio\Personal Firewall\persfw.exe
D:\Program Files\Adobe\Photoshop Elements 3.0\PhotoshopElementsDeviceConnect.exe
C:\WINDOWS\Explorer.exe
J:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\MSN Messenger\MsnMsgr.Exe
D:\Program Files\Skype\Phone\Skype.exe
j:\Program Files\Alwil Software\Avast4\ashWebSv.exe
J:\Program Files\Hercules\WiFi Station\WifiStation.exe
D:\Program Files\RemindMe\REMINDME.EXE
j:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
D:\Program Files\Nero\nero.exe
C:\WINDOWS\System32\imapi.exe
F:\Downloads\Outils_04\Hijack This\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = file://C:\WINDOWS\System32\SearchBar.htm
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.free.fr/freebox/index.html
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page =
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: (no name) - {20EC3D2D-33C1-4C9D-BC37-C2D500688DA2} - (no file)
F0 - system.ini: Shell=Explorer.exe install32m.exe
F2 - REG:system.ini: Shell=Explorer.exe install32m.exe
F2 - REG:system.ini: UserInit=userinit.exe,xpjava.exe
O2 - BHO: (no name) - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - D:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - D:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: (no name) - {5C8B2A36-3DB1-42A4-A3CB-D426709BBFEB} - (no file)
O2 - BHO: (no name) - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: UCmore XP - The Search Accelerator - {44BE0690-5429-47f0-85BB-3FFD8020233E} - C:\Program Files\TheSearchAccelerator\UCMTSAIE.dll (file missing)
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll
O4 - HKLM\..\Run: [SystemTray] SysTray.Exe
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [avast!] j:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\RunServices: [MSN PLUS XP] wspad.exe
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [Skype] "d:\Program Files\Skype\Phone\Skype.exe" /nosplash /minimized
O4 - Startup: RemindMe.lnk = D:\Program Files\RemindMe\REMINDME.EXE
O4 - Startup: stimon.exe.lnk = C:\WINDOWS\SYSTEM32\stimon.exe
O4 - Global Startup: WiFi Station.lnk = ?
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: &Traduire à partir de l'anglais - res://c:\program files\google\GoogleToolbar1.dll/cmwordtrans.html
O8 - Extra context menu item: Pages liées - res://c:\program files\google\GoogleToolbar1.dll/cmbacklinks.html
O8 - Extra context menu item: Pages similaires - res://c:\program files\google\GoogleToolbar1.dll/cmsimilar.html
O8 - Extra context menu item: Recherche &Google - res://c:\program files\google\GoogleToolbar1.dll/cmsearch.html
O8 - Extra context menu item: Version de la page actuelle disponible dans le cache Google - res://c:\program files\google\GoogleToolbar1.dll/cmcache.html
O9 - Extra 'Tools' menuitem: Console Java (Sun) (HKLM)
O9 - Extra button: Ajouter un Pop-Up (HKLM)
O9 - Extra 'Tools' menuitem: Tools Menu Item (HKLM)
O9 - Extra button: Messenger (HKLM)
O9 - Extra 'Tools' menuitem: Windows Messenger (HKLM)
O16 - DPF: {02BF25D5-8C17-4B23-BC80-D3488ABDDC6B} - http://www.apple.com/qtactivex/qtplugin.cab
O16 - DPF: {14B87622-7E19-4EA8-93B3-97215F77A6BC} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab31267.cab
O16 - DPF: {1F83CD9E-505E-4F87-BECE-0832A763E36F} (Image Uploader 3.0 Control) - http://www.mypixmania.com/fr/fr/importer/MypixUploader.cab
O16 - DPF: {24311111-1111-1121-1111-111191113457} - file://c:\eied_s7.cab
O16 - DPF: {2917297F-F02B-4B9D-81DF-494B6333150B} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab31267.cab
O16 - DPF: {33331111-1111-1111-1111-611111193457} - file://c:\ex.cab
O16 - DPF: {33331111-1111-1111-1111-611111193458} - file://c:\ex.cab
O16 - DPF: {74D05D43-3236-11D4-BDCD-00C04F9A3B61} (HouseCall Control) - https://www.trendmicro.com/en_us/forHome/products/housecall.html
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsClient.cab31267.cab
O16 - DPF: {A18962F6-E6ED-40B1-97C9-1FB36F38BFA8} (Aurigma Image Uploader 3.5 Control) - http://www.photoways.com/clients/ImageUploader3.cab
O16 - DPF: {B8BE5E93-A60C-4D26-A2DC-220313175592} (ZoneIntro Class) - http://messenger.zone.msn.com/binary/ZIntro.cab32846.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O16 - DPF: {DECEAAA2-370A-49BB-9362-68C3A58DDC62} (SAIX) - http://static.zangocash.com/cab/Zango/ie/bridge-c11.cab?5fa8dfea453d18aea3a7d1b15...