Salve a tutti mi chiamo Emanuele, ho un problema con il mio sistema windows Xp Pro, che sembra andare avanti in modo molto pesante e non fluido come vorrei.
Ho fatto il log con Hijack this, sperando in un vostro aiuto su come agire per pulire il sistema.

Logfile of HijackThis v1.99.1
Scan saved at 17.46.57, on 17/08/2006
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

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
C:\Programmi\AntiVir PersonalEdition Classic\sched.exe
C:\Programmi\AntiVir PersonalEdition Classic\avguard.exe
C:\WINDOWS\ATKKBService.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\rundll32.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\Programmi\AntiVir PersonalEdition Classic\avgnt.exe
C:\Programmi\File comuni\Real\Update_OB\realsched.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\Programmi\D-Tools\daemon.exe
C:\Programmi\Adobe\Photoshop Album Starter Edition\3.0\Apps\apdproxy.exe
C:\Programmi\File comuni\PCSuite\DataLayer\DataLayer.exe
C:\Programmi\Nokia\Nokia PC Suite 6\LaunchApplication.exe
C:\Programmi\Messenger\msmsgs.exe
C:\Programmi\File comuni\Ahead\lib\NMBgMonitor.exe
C:\Programmi\Nokia\Nokia PC Suite 6\PcSync2.exe
C:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
C:\PROGRA~1\FILECO~1\PCSuite\Services\SERVIC~1.EXE
C:\Programmi\Alice ti aiuta\bin\mpbtn.exe
C:\PROGRA~1\FILECO~1\Nokia\MPAPI\MPAPI3s.exe
C:\WINDOWS\system32\WgaTray.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Documents and Settings\MManu\Desktop\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.it/
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = 127.0.0.1
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
F2 - REG:system.ini: UserInit=C:\WINDOWS\system32\Userinit.exe
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\Programmi\Spybot - Search & Destroy\SDHelper.dll
O3 - Toolbar: (no name) - {BA52B914-B692-46c4-B683-905236F6F655} - (no file)
O4 - HKLM\..\Run: [CnxTrApp] rundll32.exe "C:\Programmi\Pirelli\Access Gateway USB Network\CnxTrApp.dll",AppEntry -REG "Pirelli\Access Gateway USB"
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [avgnt] "C:\Programmi\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKLM\..\Run: [TkBellExe] "C:\Programmi\File comuni\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [DAEMON Tools-1033] "C:\Programmi\D-Tools\daemon.exe" -lang 1033
O4 - HKLM\..\Run: [Adobe Photo Downloader] "C:\Programmi\Adobe\Photoshop Album Starter Edition\3.0\Apps\apdproxy.exe"
O4 - HKLM\..\Run: [DataLayer] C:\Programmi\File comuni\PCSuite\DataLayer\DataLayer.exe
O4 - HKLM\..\Run: [PCSuiteTrayApplication] C:\Programmi\Nokia\Nokia PC Suite 6\LaunchApplication.exe -onlytray
O4 - HKCU\..\Run: [MSMSGS] "C:\Programmi\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Programmi\File comuni\Ahead\lib\NMBgMonitor.exe"
O4 - HKCU\..\Run: [Steam] "d:\giochi\steam.exe" -silent
O4 - HKCU\..\Run: [PcSync] C:\Programmi\Nokia\Nokia PC Suite 6\PcSync2.exe /NoDialog
O4 - Global Startup: Alice ti aiuta.lnk = C:\Programmi\Alice ti aiuta\bin\matcli.exe
O4 - Global Startup: Avvio veloce di Adobe Reader.lnk = C:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O16 - DPF: {00B71CFB-6864-4346-A978-C0A14556272C} (Checkers Class) - http://messenger.zone.msn.com/binary/msgrchkr.cab31267.cab
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsClient.cab31267.cab
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O23 - Service: AntiVir PersonalEdition Classic Scheduler (AntiVirScheduler) - Avira GmbH - C:\Programmi\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: AntiVir PersonalEdition Classic Guard (AntiVirService) - AVIRA GmbH - C:\Programmi\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: ATK Keyboard Service (ATKKeyboardService) - ASUSTeK COMPUTER INC. - C:\WINDOWS\ATKKBService.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe

grazie mille

ciao
in che senso lentissimo?
il tuo log a parte questa voce inutile , risulta pulito
O3 - Toolbar: (no name) - {BA52B914-B692-46c4-B683-905236F6F655} - (no file)

Prova a fare uno scan online
http://steven.altervista.org/files/scan.html

e poi ti consiglierei di fare questi procedimenti:
Elimina tutte le applicazioni dall'avvio automatico , tranne i programmi per la sicurezza in real time , come l'antivirus etc..
Per farlo vai su start->esegui->digita <b>msconfig</b> e dai l'ok ....
Portati nel tab "avvio", togli tutte le spunte tranne quelle relative ai programmi di sicurezza .... Apllica -> Ok e riavvia

esegui anche uno scan disk , seguito da una deframmentazione , e vedi se le cose milgliorano