ho seguito la procedura minuziosamente ma alcune righe non scompaiono. Vi riposto il log aggiornato. Grazie.
Logfile of HijackThis v1.99.1
Scan saved at 20.30.50, on 20/06/2005
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\Ati2evxx.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\Alwil Software\Avast4\aswUpdSv.exe
C:\Programmi\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\wltrysvc.exe
C:\WINDOWS\System32\bcmwltry.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\Programmi\Synaptics\SynTP\SynTPLpr.exe
C:\Programmi\Synaptics\SynTP\SynTPEnh.exe
C:\Programmi\Java\j2re1.4.2_01\bin\jusched.exe
C:\WINDOWS\AGRSMMSG.exe
C:\Programmi\ltmoh\Ltmoh.exe
C:\Programmi\Acer\Notebook Manager\almxptray.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\Program Files\Launch Manager\LaunchAp.exe
C:\Program Files\Launch Manager\PowerKey.exe
C:\Program Files\Launch Manager\HotkeyApp.exe
C:\Program Files\Launch Manager\CtrlVol.exe
C:\Program Files\Launch Manager\OSDCtrl.exe
C:\Program Files\Launch Manager\Wbutton.exe
C:\Programmi\CyberLink\PowerDVD\PDVDServ.exe
C:\Programmi\HP\HP Software Update\HPWuSchd2.exe
C:\Programmi\HP\hpcoretech\hpcmpmgr.exe
C:\Programmi\MSN Apps\Updater\01.02.3000.1001\it\msnappau.exe
C:\WINDOWS\System32\LXSUPMON.EXE
C:\PROGRA~1\Lexmark\PHOTOC~1\LXBLKsk.exe
C:\Programmi\Lexmark\Lexmark Photo Center\MemoryCardManager.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Programmi\Microsoft AntiSpyware\gcasServ.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Programmi\HP\Digital Imaging\bin\hpqtra08.exe
C:\Programmi\Mouse\Mouse Control\Panel.exe
C:\Programmi\Microsoft AntiSpyware\gcasDtServ.exe
C:\Programmi\HP\Digital Imaging\bin\hpqgalry.exe
C:\WINDOWS\System32\wuauclt.exe
C:\Programmi\Internet Explorer\iexplore.exe
C:\Documents and Settings\teresa\Desktop\PROTEZIONE PC\hijackthis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://g.msn.it/0SEITIT/SAOS01
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.specialgoods.info/ad/ad0411/
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: ST - {9394EDE7-C8B5-483E-8773-474BF36AF6E4} - C:\Programmi\MSN Apps\ST\01.03.0000.1005\en-xu\stmain.dll
O2 - BHO: MSNToolBandBHO - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\MSN Apps\MSN Toolbar\01.02.4000.1001\it\msntb.dll
O3 - Toolbar: MSN - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\MSN Apps\MSN Toolbar\01.02.4000.1001\it\msntb.dll
O4 - HKLM\..\Run: [ATIModeChange] Ati2mdxx.exe
O4 - HKLM\..\Run: [ATIPTA] C:\Programmi\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [SynTPLpr] C:\Programmi\Synaptics\SynTP\SynTPLpr.exe
O4 - HKLM\..\Run: [SynTPEnh] C:\Programmi\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programmi\Java\j2re1.4.2_01\bin\jusched.exe
O4 - HKLM\..\Run: [AGRSMMSG] AGRSMMSG.exe
O4 - HKLM\..\Run: [LtMoh] C:\Programmi\ltmoh\Ltmoh.exe
O4 - HKLM\..\Run: [AcerNotebookManager] C:\Programmi\Acer\Notebook Manager\almxptray.exe
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [LaunchAp] C:\Program Files\Launch Manager\LaunchAp.exe
O4 - HKLM\..\Run: [PowerKey] "C:\Program Files\Launch Manager\PowerKey.exe"
O4 - HKLM\..\Run: [LManager] C:\Program Files\Launch Manager\HotkeyApp.exe
O4 - HKLM\..\Run: [CtrlVol] C:\Program Files\Launch Manager\CtrlVol.exe
O4 - HKLM\..\Run: [LMgrOSD] C:\Program Files\Launch Manager\OSDCtrl.exe
O4 - HKLM\..\Run: [Wbutton] "C:\Program Files\Launch Manager\Wbutton.exe"
O4 - HKLM\..\Run: [RemoteControl] C:\Programmi\CyberLink\PowerDVD\PDVDServ.exe
O4 - HKLM\..\Run: [HP Software Update] "C:\Programmi\HP\HP Software Update\HPWuSchd2.exe"
O4 - HKLM\..\Run: [HP Component Manager] "C:\Programmi\HP\hpcoretech\hpcmpmgr.exe"
O4 - HKLM\..\Run: [msnappau] "C:\Programmi\MSN Apps\Updater\01.02.3000.1001\it\msnappau.exe"
O4 - HKLM\..\Run: [LXSUPMON] C:\WINDOWS\System32\LXSUPMON.EXE RUN
O4 - HKLM\..\Run: [LXBLKsk] C:\PROGRA~1\Lexmark\PHOTOC~1\LXBLKsk.exe
O4 - HKLM\..\Run: [MemoryCardManager] C:\Programmi\Lexmark\Lexmark Photo Center\MemoryCardManager.exe -startup
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [Error Nuker] C:\Programmi\Error Nuker\bin\ErrorNuker.exe autostart
O4 - HKLM\..\Run: [gcasServ] "C:\Programmi\Microsoft AntiSpyware\gcasServ.exe"
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - Global Startup: Avvio rapido di HP Image Zone.lnk = C:\Programmi\HP\Digital Imaging\bin\hpqthb08.exe
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Programmi\HP\Digital Imaging\bin\hpqtra08.exe
O4 - Global Startup: Mouse Control.lnk = C:\Programmi\Mouse\Mouse Control\Panel.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Programmi\Microsoft Office\Office10\OSA.EXE
O4 - Global Startup: LG SyncManager.lnk = ?
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
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: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://v5.windowsupdate.microsoft.com/v5consumer/V5Controls/en/x86/client/wuweb_site.cab?1119139535640
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/msnmessengersetupdownloader.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{0486B8D2-39B0-48F5-ACA9-0E570CC36BF1}: NameServer = 193.70.192.25 193.70.152.25
O17 - HKLM\System\CS1\Services\Tcpip\..\{0486B8D2-39B0-48F5-ACA9-0E570CC36BF1}: NameServer = 193.70.192.25 193.70.152.25
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - C:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINDOWS\System32\Ati2evxx.exe
O23 - Service: avast! Antivirus - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashServ.exe
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. - C:\WINDOWS\system32\LEXBCES.EXE
O23 - Service: WLTRYSVC - Unknown owner - C:\WINDOWS\System32\wltrysvc.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).

==================================
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.specialgoods.info/ad/ad0411/
==================================


Vai a PANNELLO DI CONTROLLO e clicca su OPZIONI INTERNET
nella finestra che si apre clicca i tre pulsanti
ELIMINA COOKIES - ELIMINA FILE - CANCELLA CRONOOLOGIA


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.

Fai un ulteriore cvontrollo antivirus da questo indirizzo per verificare se il tuo antivirus e funzionante
http://security.symantec.com/default.asp?productid=symhome&langid=it&venid=sym

Installa questo programma Firewall
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=56

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

Aggiorna Windows tramite windows update con le ultime patch di protezione

Ti ricordo inoltre che Antivirus e Firewall GRATUITI non offrono la massima protezione, appena ti é possibile ti consiglio di acquistare questi programmi in versione completi.

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Collaboratore Aiutamici