Chiedevo un aiuto per l'esame del log di HijackThis, considerata la mia inesperienza nel settore!
Desideravo precisare che nel log riscontro elementi relativi a prodotti Symantec, disinstallati da tempo!
Grazie.

Logfile of HijackThis v1.99.1
Scan saved at 3.49.46, on 16/02/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16608)

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\Ati2evxx.exe
C:\Programmi\Lavasoft\Ad-Aware 2007\aawservice.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\a-squared Free\a2service.exe
C:\PROGRA~1\APC\POWERC~1\agent\pbeagent.exe
C:\PROGRA~1\APC\POWERC~1\server\PBESER~1.EXE
C:\Programmi\Kaspersky Lab\Kaspersky Anti-Virus 7.0\avp.exe
C:\Programmi\File comuni\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS\system32\svchost.exe
C:\Programmi\Logitech\iTouch\iTouch.exe
C:\Programmi\CyberLink\PowerDVD\PDVDServ.exe
C:\Programmi\Java\jre1.6.0_04\bin\jusched.exe
C:\Programmi\Logitech\MouseWare\system\em_exec.exe
C:\WINDOWS\system32\LVCOMSX.EXE
C:\Programmi\Logitech\Video\LogiTray.exe
C:\WINDOWS\RTHDCPL.EXE
C:\Programmi\Unlocker\UnlockerAssistant.exe
C:\Programmi\Winamp\winampa.exe
C:\Programmi\Kaspersky Lab\Kaspersky Anti-Virus 7.0\avp.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\Logitech\Video\FxSvr2.exe
C:\Programmi\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
C:\Programmi\MemoRex\MemoRex.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\Programmi\Windows Live\Messenger\msnmsgr.exe
C:\Programmi\Windows Live\Messenger\usnsvc.exe
C:\Documents and Settings\Giuseppe\Desktop\Hijackthis\HijackThis.exe

R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,SearchAssistant = http://www.crawler.com/search/ie.aspx?tb_id=66008
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,CustomizeSearch = http://dnl.crawler.com/support/sa_customize.aspx?TbId=66008
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
F2 - REG:system.ini: UserInit=C:\WINDOWS\system32\userinit.exe
O2 - BHO: Supporto di collegamento per Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\File comuni\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programmi\Java\jre1.6.0_04\bin\ssv.dll
O2 - BHO: Guida per l'accesso a Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\programmi\google\googletoolbar2.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Programmi\Google\GoogleToolbarNotifier\2.0.301.7164\swg.dll
O2 - BHO: Windows Live Toolbar Helper - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\Windows Live Toolbar\msntb.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\programmi\google\googletoolbar2.dll
O3 - Toolbar: Windows Live Toolbar - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\Windows Live Toolbar\msntb.dll
O4 - HKLM\..\Run: [zBrowser Launcher] C:\Programmi\Logitech\iTouch\iTouch.exe
O4 - HKLM\..\Run: [Logitech Utility] Logi_MwX.Exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [RemoteControl] C:\Programmi\CyberLink\PowerDVD\PDVDServ.exe
O4 - HKLM\..\Run: [CloneCDTray] "C:\Programmi\SlySoft\CloneCD\CloneCDTray.exe" /s
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programmi\Java\jre1.6.0_04\bin\jusched.exe"
O4 - HKLM\..\Run: [LVCOMSX] C:\WINDOWS\system32\LVCOMSX.EXE
O4 - HKLM\..\Run: [LogitechVideoRepair] C:\Programmi\Logitech\Video\ISStart.exe
O4 - HKLM\..\Run: [LogitechVideoTray] C:\Programmi\Logitech\Video\LogiTray.exe
O4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXE
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [UnlockerAssistant] "C:\Programmi\Unlocker\UnlockerAssistant.exe"
O4 - HKLM\..\Run: [WinampAgent] C:\Programmi\Winamp\winampa.exe
O4 - HKLM\..\Run: [MemoREX] "C:\Programmi\MemoRex\MemoRexStart.exe"
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Programmi\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [AVP] "C:\Programmi\Kaspersky Lab\Kaspersky Anti-Virus 7.0\avp.exe"
O4 - HKCU\..\Run: [NBJ] "C:\Programmi\Ahead\Nero BackItUp\NBJ.exe"
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [updateMgr] "C:\Programmi\Adobe\Acrobat 7.0\Reader\AdobeUpdateManager.exe" AcRdB7_0_9 -reboot 1
O4 - HKCU\..\Run: [swg] C:\Programmi\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
O4 - HKCU\..\RunOnce: [] C:\PROGRA~1\Mozilla Firefox\firefox.exe http://www.symantec.com/techsupp/servlet/ProductMessages?module=2007&error=0&language=it&product=SymNRT&version=2008.0.1.19&build=Symantec&a=00000082.00000010.00000020&b=00000082.00000045.0000011b&c=00000082.00000049.000000bb
O8 - Extra context menu item: &Windows Live Search - res://C:\Programmi\Windows Live Toolbar\msntb.dll/search.htm
O8 - Extra context menu item: Add to Windows &Live Favorites - http://favorites.live.com/quickadd.aspx
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.6.0_04\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.6.0_04\bin\ssv.dll
O9 - Extra button: Web Anti-Virus - {1F460357-8A94-4D71-9CA3-AA4ACF32ED8E} - C:\Programmi\Kaspersky Lab\Kaspersky Anti-Virus 7.0\SCIEPlgn.dll
O11 - Options group: [INTERNATIONAL] International*
O16 - DPF: {0A5FD7C5-A45C-49FC-ADB5-9952547D5715} (Creative Software AutoUpdate) - http://www.creative.com/su/ocx/15026/CTSUEng.cab
O16 - DPF: {2BC66F54-93A8-11D3-BEB6-00105AA9B6AE} (Symantec AntiVirus scanner) - http://security.symantec.com/sscv6/SharedContent/vc/bin/AvSniff.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1126789574906
O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) - http://security.symantec.com/sscv6/SharedContent/common/bin/cabsa.cab
O16 - DPF: {6E5A37BF-FD42-463A-877C-4EB7002E68AE} (Housecall ActiveX 6.5) - http://eu-housecall.trendmicro-europe.com/housecall/applet/html/native/x86/win32/activex/hcImpl.cab
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/MsnMessengerSetupDownloader.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O16 - DPF: {EF791A6B-FC12-4C68-99EF-FB9E207A39E6} (McFreeScan Class) - http://download.mcafee.com/molbin/iss-loc/mcfscan/2,1,0,4724/mcfscan.cab
O16 - DPF: {EFD3EA56-234D-4240-90EA-CC9FA3AF5A01} (ConnectivityTester Class) - http://aiuto.alice.it/ata/static/installers/WebflowActiveXInstaller_4-1-4.cab
O16 - DPF: {F6ACF75C-C32C-447B-9BEF-46B766368D29} (Creative Software AutoUpdate Support Package) - http://www.creative.com/su/ocx/15028/CTPID.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{F8064CBE-3CAA-4D22-8722-8DC42D0785CF}: NameServer = 85.37.17.39,85.38.28.71
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\WINDOW~4\MESSEN~1\MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\WINDOW~4\MESSEN~1\MSGRAP~1.DLL
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FILECO~1\Skype\SKYPE4~1.DLL
O18 - Protocol: wlmailhtml - {03C514A3-1EFB-4856-9F99-10D7BE1653C0} - C:\Programmi\Windows Live\Mail\mailcomm.dll
O20 - Winlogon Notify: klogon - C:\WINDOWS\system32\klogon.dll
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O23 - Service: a-squared Free Service (a2free) - Emsi Software GmbH - C:\Programmi\a-squared Free\a2service.exe
O23 - Service: Ad-Aware 2007 Service (aawservice) - Lavasoft - C:\Programmi\Lavasoft\Ad-Aware 2007\aawservice.exe
O23 - Service: APC PBE Agent (APCPBEAgent) - APC - C:\PROGRA~1\APC\POWERC~1\agent\pbeagent.exe
O23 - Service: APC PBE Server (APCPBEServer) - APC - C:\PROGRA~1\APC\POWERC~1\server\PBESER~1.EXE
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: Kaspersky Anti-Virus 7.0 (AVP) - Unknown owner - C:\Programmi\Kaspersky Lab\Kaspersky Anti-Virus 7.0\avp.exe" -r (file missing)
O23 - Service: Google Updater Service (gusvc) - Google - C:\Programmi\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programmi\File comuni\InstallShield\Driver\1150\Intel 32\IDriverT.exe
O23 - Service: Utilità di pianificazione di LiveUpdate automatico - Unknown owner - C:\Programmi\Symantec\LiveUpdate\ALUSchedulerSvc.exe (file missing)

Ti do perfettamente ragione, me ne sono accorto anch'io sul mio portatile col NIS preinstallato e che poi ho rimosso. Nonostante il tool di rimozione di Symantec, purtroppo rimane qualche chiave di registro o qualche servizio.

Riguardo al tuo log, fixa le righe sotto, una fa appunto riferimento al Norton, l'altra alla scheda video Ati Radeon che, dicono, contenga uno spyware. In ogni modo io te la faccio toglietre solo dall'esecuzione automatica, non ti faccio disinstallare l'exe associato.

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O23 - Service: Utilità di pianificazione di LiveUpdate automatico - Unknown owner - C:\Programmi\Symantec\LiveUpdate\ALUSchedulerSvc.exe (file missing)
O4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXE

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Ciao.

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Ciao, fai così:

Avvia hijackthis, con tutte le applicazioni chiuse, premi su Do a system scan only , spunta ed elimina (tasto Fix checked) le righe che ti hi indicato:

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O23 - Service: Utilità di pianificazione di LiveUpdate automatico - Unknown owner - C:\Programmi\Symantec\LiveUpdate\ALUSchedulerSvc.exe (file missing)
O4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXE

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Tutto qua.

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Dovresti farcela anche in mod normale. Altrimenti vai in provvisoria.

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