ogni tanto si attiva un pagina internet(xxx) e poi mi blocca il moden.
Logfile of HijackThis v1.98.2
Scan saved at 19.09.01, on 17/11/2004
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\LEXBCES.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\LEXPPS.EXE
C:\Programmi\File comuni\Symantec Shared\ccSetMgr.exe
C:\Programmi\Norton AntiVirus\navapsvc.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\Programmi\Norton AntiVirus\SAVScan.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\File comuni\Symantec Shared\ccEvtMgr.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\Dit.exe
C:\WINDOWS\System32\NVATray.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\Programmi\Medion\PowerVCR II\Agent.exe
C:\Programmi\MUSICMATCH\MUSICMATCH Jukebox\mm_tray.exe
C:\WINDOWS\System32\rundll32.exe
C:\Programmi\Ahead\InCD\InCD.exe
C:\WINDOWS\SOINTGR.EXE
C:\Programmi\Lexmark X5100 Series\lxbabmgr.exe
C:\Programmi\File comuni\Symantec Shared\ccApp.exe
C:\Programmi\Lexmark X5100 Series\lxbabmon.exe
C:\WINDOWS\System32\Yahoo.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Programmi\Messenger\msmsgs.exe
C:\WINDOWS\DitExp.exe
C:\WINDOWS\System32\wuauclt.exe
C:\WINDOWS\System32\wuauclt.exe
C:\Programmi\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://gw.aliceadsl.it/minisearch
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.virgilio.it/
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer fornito da Alice
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Programmi\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Programmi\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [Dit] Dit.exe
O4 - HKLM\..\Run: [NVIDIA nForce APU1 Utilities] NVATray.exe
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [Agent] C:\Programmi\Medion\PowerVCR II\Agent.exe
O4 - HKLM\..\Run: [Remote_Agent] C:\Programmi\Medion\PowerVCR II\RemoteAgent.exe
O4 - HKLM\..\Run: [MMTray] C:\Programmi\MUSICMATCH\MUSICMATCH Jukebox\mm_tray.exe
O4 - HKLM\..\Run: [AdslTaskBar] rundll32.exe stmctrl.dll,TaskBar
O4 - HKLM\..\Run: [NeroCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [InCD] C:\Programmi\Ahead\InCD\InCD.exe
O4 - HKLM\..\Run: [SO5 Integrator Pass Two] C:\WINDOWS\SOINTGR.EXE
O4 - HKLM\..\Run: [Lexmark X5100 Series] "C:\Programmi\Lexmark X5100 Series\lxbabmgr.exe"
O4 - HKLM\..\Run: [ccApp] "C:\Programmi\File comuni\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [SSC_UserPrompt] C:\Programmi\File comuni\Symantec Shared\Security Center\UsrPrmpt.exe
O4 - HKLM\..\Run: [BluetoothAuthenticationAgent] rundll32.exe irprops.cpl,,BluetoothAuthenticationAgent
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE NvQTwk,NvCplDaemon initialize
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [Yahoo Update] Yahoo.exe
O4 - HKLM\..\RunServices: [Yahoo Update] Yahoo.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Programmi\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [Yahoo Update] Yahoo.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\MSMSGS.EXE
O9 - Extra 'Tools' menuitem: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\MSMSGS.EXE
O9 - Extra button: Alice - {7AEAFAAD-2249-451C-AE02-EF10DB7B0535} - http://gw.aliceadsl.it/alice (file missing) (HKCU)
O17 - HKLM\System\CCS\Services\Tcpip\..\{B4E4E79B-DA6E-43FA-A4E2-6CA4B1423977}: NameServer = 217.141.252.203 151.99.125.1

Nel log non vedo nulla di anormale, prova a riavviare il computer in Modalità provvisoria, leggi qui come fare
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=344&SH=N

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

Fai anche una scansione Antivirus.

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Collaboratore Aiutamici