ciao mi controllate questo log per favore? grazie:
Logfile of HijackThis v1.99.1
Scan saved at 0.18.41, on 12/04/2005
Platform: Windows XP (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 (6.00.2600.0000)

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\logonui.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
C:\Programmi\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\WINDOWS\System32\RunDll32.exe
C:\WINDOWS\System32\RUNDLL32.EXE
C:\WINDOWS\System32\winsi32.exe
C:\WINDOWS\System32\sp2hosts.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Programmi\Messenger\msmsgs.exe
C:\Programmi\WinZip\WZQKPICK.EXE
C:\PROGRA~1\INCRED~1\bin\IMApp.exe
C:\Programmi\Alwil Software\Avast4\ashWebSv.exe
C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe
C:\WINDOWS\System32\wuauclt.exe
C:\Programmi\Spybot - Search & Destroy\SpybotSD.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\Documents and Settings\ngrufugnuti\Desktop\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.it/
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
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: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [Cmaudio] RunDll32 cmicnfg.cpl,CMICtrlWnd
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\System32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [Window_Protect] winsi32.exe
O4 - HKLM\..\Run: [NTSF MICROSOFT SYSTEM] winsis32.exe
O4 - HKLM\..\Run: [RSPC Driver D] zglam.exe
O4 - HKLM\..\Run: [Sygate Personal Firewall] sp2hosts.exe
O4 - HKLM\..\Run: [Windows System Manager] winsystem.exe
O4 - HKLM\..\Run: [Flashget Download Manager] Flashget.exe
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\RunServices: [Window_Protect] winsi32.exe
O4 - HKLM\..\RunServices: [NTSF MICROSOFT SYSTEM] winsis32.exe
O4 - HKLM\..\RunServices: [RSPC Driver D] zglam.exe
O4 - HKLM\..\RunServices: [Sygate Personal Firewall] sp2hosts.exe
O4 - HKLM\..\RunServices: [Windows System Manager] winsystem.exe
O4 - HKLM\..\RunServices: [Flashget Download Manager] Flashget.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Programmi\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [NTSF MICROSOFT SYSTEM] winsis32.exe
O4 - HKCU\..\Run: [Window_Protect] winsi32.exe
O4 - HKCU\..\Run: [Sygate Personal Firewall] sp2hosts.exe
O4 - HKCU\..\Run: [Windows System Manager] winsystem.exe
O4 - HKCU\..\Run: [RSPC Driver D] zglam.exe
O4 - HKCU\..\Run: [IncrediMail] C:\Programmi\IncrediMail\bin\IncMail.exe /c
O4 - Global Startup: Avvio veloce di Adobe Reader.lnk = C:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Programmi\Microsoft Office\Office10\OSA.EXE
O4 - Global Startup: WinZip Quick Pick.lnk = C:\Programmi\WinZip\WZQKPICK.EXE
O8 - Extra context menu item: &Add animation to IncrediMail Style Box - C:\PROGRA~1\INCRED~1\bin\resources\WebMenuImg.htm
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://v5.windowsupdate.microsoft.com/v5consumer/V5Controls/en/x86/client/wuweb_site.cab?1113224777826
O17 - HKLM\System\CCS\Services\Tcpip\..\{10E3CE17-4B52-4636-909D-B368B0ADDFE2}: NameServer = 85.37.17.11 151.99.125.1
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - C:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe

Ciao ,
esegui queste operazioni

1) Disattiva il ripristino di configurazione, leggi qui come fare
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=257&SH=N

2) riavvia in modalità provvisoria, leggi qui come fare
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=344&SH=N

apri HIJAC THIS ed elimina come indicato in questo articolo
http://www.aiutamici.com/software/descrizione.asp?CodSw=1175
le righe che seguono, (nel caso le righe da eliminare non compaiono in modalità provvisoria, eliminale dalla modalità normale e riavvia il computer).

==================================
O4 - HKLM\..\Run: [Window_Protect] winsi32.exe
O4 - HKLM\..\Run: [NTSF MICROSOFT SYSTEM] winsis32.exe
O4 - HKLM\..\Run: [RSPC Driver D] zglam.exe
O4 - HKLM\..\Run: [Sygate Personal Firewall] sp2hosts.exe
O4 - HKLM\..\Run: [Windows System Manager] winsystem.exe
-
O4 - HKLM\..\RunServices: [Window_Protect] winsi32.exe
O4 - HKLM\..\RunServices: [NTSF MICROSOFT SYSTEM] winsis32.exe
O4 - HKLM\..\RunServices: [RSPC Driver D] zglam.exe
O4 - HKLM\..\RunServices: [Sygate Personal Firewall] sp2hosts.exe
O4 - HKLM\..\RunServices: [Windows System Manager] winsystem.exe
-
O4 - HKCU\..\Run: [NTSF MICROSOFT SYSTEM] winsis32.exe
O4 - HKCU\..\Run: [Window_Protect] winsi32.exe
O4 - HKCU\..\Run: [Sygate Personal Firewall] sp2hosts.exe
O4 - HKCU\..\Run: [Windows System Manager] winsystem.exe
O4 - HKCU\..\Run: [RSPC Driver D] zglam.exe
-
O23 - Service: avast! Mail Scanner - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
==================================

Con la funzione TROVA di Windows, cerca ed elimina questi file,

==================================
winsi32.exe
winsis32.exe
zglam.exe
sp2hosts.exe
winsystem.exe
==================================

al termine utilizza i programmi AD-AWARE e SPYBOT indicati in questo articolo
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=388&SH=N

sempre in modalità provvisoria fai una scansione Antivirus

quindi riavvia il computer e controlla se il problema e risolto, se e tutto OK riattiva il ripristino configurazione disattivato all'inizio di questa procedura.

Consigli
1) devi aggiornare il windows con i pacchetti di sicurezza dal Windows Update
2) necessita di un programma Firewall e un Antivirus completi, le versioni gratuite non offrono la massima protezione.

Dopo aver fatto tutto collegati a questo indirizzo e fai una scansione antivirus on line
http://security.symantec.com/default.asp?productid=symhome&langid=it&venid=sym

---

alfonso_aiutamici@hotmail.it