Ciao Alfonso,
ho seguito le istruzioni

Mi verifichi il log per cortesia?
Logfile of Trend Micro HijackThis v2.0.0 (BETA)
Scan saved at 8.43.14, on 12/09/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
Boot mode: Normal

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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\Windows Defender\MsMpEng.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\Ahead\InCD\InCDsrv.exe
C:\Programmi\File comuni\Symantec Shared\ccSetMgr.exe
C:\Programmi\File comuni\Symantec Shared\ccEvtMgr.exe
C:\Programmi\File comuni\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\PIFSvc.exe
C:\Programmi\File comuni\Symantec Shared\SNDSrvc.exe
C:\Programmi\File comuni\Symantec Shared\SPBBC\SPBBCSvc.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\cisvc.exe
C:\WINDOWS\system32\CTsvcCDA.EXE
C:\Programmi\Norton SystemWorks\Norton GoBack\GBPoll.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\Intel\Intel Application Accelerator\iaantmon.exe
C:\WINDOWS\system32\inetsrv\inetinfo.exe
C:\Programmi\File comuni\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\Programmi\Norton SystemWorks\Norton AntiVirus\navapsvc.exe
C:\Programmi\Norton SystemWorks\Norton AntiVirus\IWP\NPFMntor.exe
C:\PROGRA~1\NORTON~1\NORTON~3\NPROTECT.EXE
C:\WINDOWS\system32\HPZipm12.exe
C:\WINDOWS\system32\Service.exe
C:\WINDOWS\system32\tcpsvcs.exe
C:\WINDOWS\System32\snmp.exe
C:\PROGRA~1\NORTON~1\NORTON~3\SPEEDD~1\NOPDB.EXE
C:\WINDOWS\system32\svchost.exe
C:\Programmi\File comuni\Symantec Shared\CCPD-LC\symlcsvc.exe
C:\Programmi\Symantec\LiveUpdate\ALUSchedulerSvc.exe
C:\WINDOWS\system32\mqsvc.exe
C:\WINDOWS\system32\mqtgsvc.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\Java\j2re1.4.2_03\bin\jusched.exe
C:\Programmi\Intel\Intel Application Accelerator\iaanotif.exe
C:\Programmi\Creative\SBAudigy2ZS\Surround Mixer\CTSysVol.exe
C:\Programmi\Creative\SBAudigy2ZS\DVDAudio\CTDVDDET.EXE
C:\WINDOWS\system32\CTHELPER.EXE
C:\Programmi\CyberLink\PowerDVD\DVDLauncher.exe
C:\Programmi\Dell\Media Experience\DMXLauncher.exe
C:\Programmi\Ahead\InCD\InCD.exe
C:\WINDOWS\system32\RunDLL32.exe
C:\Programmi\File comuni\Symantec Shared\ccApp.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\Spybot - Search & Destroy\TeaTimer.exe
C:\Programmi\Windows Media Player\WMPNSCFG.exe
C:\Programmi\Adobe\Acrobat 5.0\Distillr\AcroTray.exe
C:\Programmi\Microsoft SQL Server\80\Tools\Binn\sqlmangr.exe
C:\Programmi\Norton SystemWorks\Norton GoBack\GBTray.exe
C:\PROGRA~1\Webshots\webshots.scr
C:\Programmi\File comuni\Symantec Shared\Security Console\NSCSRVCE.EXE
C:\WINDOWS\system32\cidaemon.exe
C:\Programmi\Messenger\msmsgs.exe
C:\WINDOWS\system32\dllhost.exe
C:\WINDOWS\system32\inetsrv\DavCData.exe
C:\Programmi\ClamWin\bin\ClamTray.exe
C:\Documents and Settings\Hijack\HiJackThis_v2.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.euro.dell.com/
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.it/
R3 - URLSearchHook: (no name) - {BC4FFE41-DE9F-46fa-B455-AAD49B9F9938} - (no file)
F2 - REG:system.ini: UserInit=userinit.exe
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\File comuni\Adobe\Acrobat\ActiveX\AcroIEHelper.dll (file missing)
O2 - BHO: (no name) - {1A0AADCD-3A72-4b5f-900F-E3BB5A838E2A} - (no file)
O2 - BHO: NAV Helper - {A8F38D8D-E480-4D52-B7A2-731BB6995FDD} - C:\Programmi\Norton SystemWorks\Norton AntiVirus\NavShExt.dll
O2 - BHO: (no name) - {AA58ED58-01DD-4d91-8333-CF10577473F7} - (no file)
O3 - Toolbar: Norton AntiVirus - {C4069E3A-68F1-403E-B40E-20066696354B} - C:\Programmi\Norton SystemWorks\Norton AntiVirus\NavShExt.dll
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programmi\Java\j2re1.4.2_03\bin\jusched.exe
O4 - HKLM\..\Run: [IAAnotif] C:\Programmi\Intel\Intel Application Accelerator\iaanotif.exe
O4 - HKLM\..\Run: [ATIPTA] "C:\Programmi\ATI Technologies\ATI Control Panel\atiptaxx.exe"
O4 - HKLM\..\Run: [CTSysVol] C:\Programmi\Creative\SBAudigy2ZS\Surround Mixer\CTSysVol.exe /r
O4 - HKLM\..\Run: [CTDVDDET] C:\Programmi\Creative\SBAudigy2ZS\DVDAudio\CTDVDDET.EXE
O4 - HKLM\..\Run: [CTHelper] CTHELPER.EXE
O4 - HKLM\..\Run: [DVDLauncher] "C:\Programmi\CyberLink\PowerDVD\DVDLauncher.exe"
O4 - HKLM\..\Run: [DMXLauncher] C:\Programmi\Dell\Media Experience\DMXLauncher.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [InCD] C:\Programmi\Ahead\InCD\InCD.exe
O4 - HKLM\..\Run: [HPDJ Taskbar Utility] C:\WINDOWS\system32\spool\drivers\w32x86\3\hpztsb09.exe
O4 - HKLM\..\Run: [VF0070 STISvc] RunDLL32.exe V0070Pin.dll,RunDLL32EP 513
O4 - HKLM\..\Run: [ccApp] "C:\Programmi\File comuni\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [Symantec PIF AlertEng] "C:\Programmi\File comuni\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\PIFSvc.exe" /a /m "C:\Programmi\File comuni\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\AlertEng.dll"
O4 - HKLM\..\Run: [UpdReg] C:\WINDOWS\UpdReg.EXE
O4 - HKLM\..\Run: [ClamWin] "C:\Programmi\ClamWin\bin\ClamTray.exe" --logon
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Programmi\Spybot - Search & Destroy\TeaTimer.exe
O4 - HKCU\..\Run: [WMPNSCFG] C:\Programmi\Windows Media Player\WMPNSCFG.exe
O4 - HKCU\..\RunOnce: [] C:\Programmi\Internet Explorer\iexplore.exe http://www.symantec.com/techsupp/servlet/ProductMessages?module=2007&error=0&language=it&product=SymNRT&version=2008.0.1.14&build=Symantec&a=00000082.00000015.00000022&b=00000082.00000021.0000004d&c=00000082.0000006e.00000141
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVIZIO LOCALE')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVIZIO DI RETE')
O4 - HKUS\S-1-5-21-1119184932-498940542-461580289-1012\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User '?')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - Startup: Webshots.lnk = C:\Programmi\Webshots\Launcher.exe
O4 - Global Startup: Acrobat Assistant.lnk = C:\Programmi\Adobe\Acrobat 5.0\Distillr\AcroTray.exe
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Programmi\File comuni\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Gestione servizi.lnk = C:\Programmi\Microsoft SQL Server\80\Tools\Binn\sqlmangr.exe
O4 - Global Startup: Norton GoBack.lnk = C:\Programmi\Norton SystemWorks\Norton GoBack\GBTray.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~3\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\WINDOWS\system32\msjava.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\WINDOWS\system32\msjava.dll
O9 - Extra button: Express Cleanup - {5E638779-1818-4754-A595-EF1C63B87A56} - C:\Programmi\Norton SystemWorks\Norton Cleanup\WCQuick.lnk
O9 - Extra 'Tools' menuitem: Express Cleanup - {5E638779-1818-4754-A595-EF1C63B87A56} - C:\Programmi\Norton SystemWorks\Norton Cleanup\WCQuick.lnk
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~3\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: {01A88BB1-1174-41EC-ACCB-963509EAE56B} (SysProWmi Class) - http://support.euro.dell.com/systemprofiler/SysPro.CAB
O16 - DPF: {05CA9FB0-3E3E-4B36-BF41-0E3A5CAA8CD8} (Office Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=58813
O16 - DPF: {0742B9EF-8C83-41CA-BFBA-830A59E23533} (Microsoft Data Collection Control) - https://support.microsoft.com/OAS/ActiveX/MSDcode.cab
O16 - DPF: {1F2F4C9E-6F09-47BC-970D-3C54734667FE} - https://www-secure.symantec.com/techsupp/asa/LSSupCtl.cab
O16 - DPF: {2BC66F54-93A8-11D3-BEB6-00105AA9B6AE} (Symantec AntiVirus scanner) - http://security.symantec.com/sscv6/SharedContent/vc/bin/AvSniff.cab
O16 - DPF: {3451DEDE-631F-421C-8127-FD793AFC6CC8} - https://www-secure.symantec.com/techsupp/asa/ctrl/SymAData.cab
O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) - http://security.symantec.com/sscv6/SharedContent/common/bin/cabsa.cab
O16 - DPF: {6A344D34-5231-452A-8A57-D064AC9B7862} (Symantec Download Manager) - https://webdl.symantec.com/activex/symdlmgr.cab
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/muweb_site.cab?1153483935796
O16 - DPF: {8AD9C840-044E-11D1-B3E9-00805F499D93} (Java Plug-in 1.4.2_03) -
O16 - DPF: {9145A52A-9B22-4858-AEE7-74D6C7D3F366} -
O16 - DPF: {CAFEEFAC-0014-0002-0003-ABCDEFFEDCBA} (Java Plug-in 1.4.2_03) -
O16 - DPF: {E1FE4155-5CF8-4B2F-A6CF-FE39B3A14FF4} -
O16 - DPF: {EA8804CE-A2F0-4773-89B8-1E5168A1D8D7} -
O17 - HKLM\System\CCS\Services\Tcpip\..\{8DEB81F5-740F-4DA7-8694-9B8DCF547BB6}: NameServer = 213.140.2.43,213.140.2.49
O22 - SharedTaskScheduler: Precaricatore Browseui - {438755C2-A8BA-11D1-B96B-00A0C90312E1} - C:\WINDOWS\system32\browseui.dll
O22 - SharedTaskScheduler: Daemon di cache delle categorie di componenti - {8C7461EF-2B13-11d2-BE35-3078302C2030} - C:\WINDOWS\system32\browseui.dll
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\SYSTEM32\ati2sgag.exe
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccEvtMgr.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccSetMgr.exe
O23 - Service: Creative Service for CDROM Access - Creative Technology Ltd - C:\WINDOWS\system32\CTsvcCDA.EXE
O23 - Service: GoBack Polling Service (GBPoll) - Symantec Corporation - C:\Programmi\Norton SystemWorks\Norton GoBack\GBPoll.exe
O23 - Service: IAA Event Monitor (IAANTMon) - Intel Corporation - C:\Programmi\Intel\Intel Application Accelerator\iaantmon.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programmi\File comuni\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: InCD Helper (InCDsrv) - Nero AG - C:\Programmi\Ahead\InCD\InCDsrv.exe
O23 - Service: LiveUpdate - Symantec Corporation - C:\PROGRA~1\Symantec\LIVEUP~1\LUCOMS~1.EXE
O23 - Service: LiveUpdate Notice Service - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\PIFSvc.exe
O23 - Service: Servizio Auto-Protect di Norton AntiVirus (navapsvc) - Symantec Corporation - C:\Programmi\Norton SystemWorks\Norton AntiVirus\navapsvc.exe
O23 - Service: Norton AntiVirus Firewall Monitor Service (NPFMntor) - Symantec Corporation - C:\Programmi\Norton SystemWorks\Norton AntiVirus\IWP\NPFMntor.exe
O23 - Service: Norton UnErase Protection (NProtectService) - Symantec Corporation - C:\PROGRA~1\NORTON~1\NORTON~3\NPROTECT.EXE
O23 - Service: Norton Protection Center Service (NSCService) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\Security Console\NSCSRVCE.EXE
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: Symantec AVScan (SAVScan) - Symantec Corporation - C:\Programmi\Norton SystemWorks\Norton AntiVirus\SAVScan.exe
O23 - Service: Dell 3007WFP (Service) - Unknown owner - C:\WINDOWS\system32\Service.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\SNDSrvc.exe
O23 - Service: SPBBCSvc - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\SPBBC\SPBBCSvc.exe
O23 - Service: Speed Disk service - Symantec Corporation - C:\PROGRA~1\NORTON~1\NORTON~3\SPEEDD~1\NOPDB.EXE
O23 - Service: Symantec Core LC - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\CCPD-LC\symlcsvc.exe
O23 - Service: Utilità di pianificazione di LiveUpdate automatico - Symantec Corporation - C:\Programmi\Symantec\LiveUpdate\ALUSchedulerSvc.exe

--
End of file - 12469 bytes

Io penso, grazie alle vostre istruzioni, di aver sistemato il pc, ma ho un grosso dubbio perchè quando vado nei rapporti del Norton vedo delle connessioni strane come AD.DE.DOUBLECLICK.NET
AS1.FALKAG.DE
che io non ho mai fatto.
Grazie per l'aiuto...

<BLOCKQUOTE id=quote><font size=1 face="Sans Serif, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>
Ciao,
esegui queste operazioni

ATTENZIONE prima di procedere con le riparazioni, fate la copia di riserva dei vostri dati,
leggete questo articolo http://www.aiutamici.com/hardware/view.asp?codcat=8
a volte eliminando un virus il sistema potrebbe non riavviarsi.
____________________________

Disattiva il ripristino di configurazione, leggi qui come fare
http://www.aiutamici.com/hardware/view.asp?codcat=28

Riavvia in modalità provvisoria, leggi qui come fare
http://www.aiutamici.com/hardware/view.asp?codcat=29

apri HIJAC THIS ed elimina come indicato in questo articolo
http://www.aiutamici.com/software/descrizione.asp?CodSw=1175
le righe che seguono.

==================================
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\File comuni\Adobe\Acrobat\ActiveX\AcroIEHelper.dll (file missing)
O2 - BHO: (no name) - {1A0AADCD-3A72-4b5f-900F-E3BB5A838E2A} - (no file)
-
O2 - BHO: (no name) - {AA58ED58-01DD-4d91-8333-CF10577473F7} - (no file)
-
O16 - DPF: {9145A52A-9B22-4858-AEE7-74D6C7D3F366} -
-
O16 - DPF: {E1FE4155-5CF8-4B2F-A6CF-FE39B3A14FF4} -
O16 - DPF: {EA8804CE-A2F0-4773-89B8-1E5168A1D8D7} -
O17 - HKLM\System\CCS\Services\Tcpip\..\{8DEB81F5-740F-4DA7-8694-9B8DCF547BB6}: NameServer = 213.140.2.43,213.140.2.49
-
O23 - Service: Dell 3007WFP (Service) - Unknown owner - C:\WINDOWS\system32\Service.exe
==================================


Con la funzione Cerca di Windows, cerca ed elimina i seguenti file
==================================
Service.exe
==================================


Elimina i file inutili del sistema utilizzando questo programma
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=1223

Utilizza questi due programmi per eliminare eventuali spyware
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=878
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=831

sempre in modalità provvisoria fai una scansione Antivirus,
se non hai un antivirus, utilizza questo programma
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=1485

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 e crea un nuovo punto di ripristino, leggi qui alla voce 8
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=170&SH=N
in caso di problemi lascialo disattivato fino alla soluzione dei problemi

Fai una scansione antivirus on line da questo indirizzo
http://security.symantec.com/sscv6/default.asp?productid=globalsites&langid=it&venid=sym
se la scansione on line rileva dei virus significa che il tuo antivirus è stato infettato o non è in grado di risolvere il problema, ti consiglio di formattare il disco fisso e reinstallare tutto, altrimenti prosegui

Utilizza questo programma
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=1041

Se utilizzi XP ti consiglio di installare questo programma
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=1472
<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Sans Serif, Arial, Helvetica" size=2 id=quote>