Ciao e grazie per l'aiuto che mi stai dando. Ho seguito le tue istruzioni alla lettera, ma purtroppo continuano ad uscire le finestre con messaggi pubblicitari di cui di ho parlato. Avresti qualche altro consiglio da darmi ? Ciao e grazie.

Ciao, Purtroppo la situazione va degenerando: appaiono sempre le finestre pubblicitarie, ed in più la pagina internet di entrata non si lascia più impostare (ho provato anche con CWshredder), compare una pagina "pirata", ed in più vengono aggiunti alla lista dei miei siti "Preferiti" dei siti "di dubbio gusto" che non riesco ad eliminare definitivamente (tornano sempre)


Allego il nuovo LOG di Highjackthis, non so se puoi darmi qualche consiglio utile, grazie.

Logfile of HijackThis v1.99.1
Scan saved at 03:28:59, on 14.06.2005
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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Launch Manager\LaunchAp.exe
C:\Program Files\Launch Manager\HotkeyApp.exe
C:\Program Files\Launch Manager\CtrlVol.exe
C:\Program Files\Launch Manager\Wbutton.exe
C:\WINDOWS\LTSMMSG.exe
C:\Programmi\Synaptics\SynTP\SynTPLpr.exe
C:\Programmi\Synaptics\SynTP\SynTPEnh.exe
C:\Programmi\File comuni\Microsoft Shared\Works Shared\WkUFind.exe
C:\Programmi\File comuni\Symantec Shared\ccApp.exe
C:\Programmi\iTunes\iTunesHelper.exe
C:\Programmi\QuickTime\qttask.exe
C:\Programmi\MSN Apps\Updater\01.02.3000.1001\it\msnappau.exe
C:\WINDOWS\apixt32.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Programmi\InterVideo\Common\Bin\WinCinemaMgr.exe
C:\WINDOWS\system32\d3oo32.exe
C:\WINDOWS\System32\Ati2evxx.exe
C:\Programmi\File comuni\Symantec Shared\ccSetMgr.exe
C:\Programmi\File comuni\Microsoft Shared\VS7Debug\mdm.exe
C:\Programmi\Norton AntiVirus\navapsvc.exe
C:\Programmi\Norton AntiVirus\SAVScan.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\File comuni\Symantec Shared\ccEvtMgr.exe
C:\Programmi\Messenger\msmsgs.exe
C:\Programmi\Internet Explorer\iexplore.exe
C:\WINDOWS\System32\wuauclt.exe
C:\Programmi\iPod\bin\iPodService.exe
C:\Documents and Settings\Michele\Desktop\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = res://C:\WINDOWS\system32\eszmz.dll/sp.html#37049
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = res://C:\WINDOWS\system32\eszmz.dll/sp.html#37049
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = about:blank
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = res://C:\WINDOWS\system32\eszmz.dll/sp.html#37049
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = res://C:\WINDOWS\system32\eszmz.dll/sp.html#37049
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = res://C:\WINDOWS\system32\eszmz.dll/sp.html#37049
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant = res://C:\WINDOWS\system32\eszmz.dll/sp.html#37049
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = res://C:\WINDOWS\system32\eszmz.dll/sp.html#37049
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page_bak = http://www.bluewin.ch/index_i.html
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
R3 - Default URLSearchHook is missing
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\AddOn\AcrobatReader\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\programmi\google\googletoolbar1.dll
O2 - BHO: Class - {BD6292E2-CEBD-27AC-7BB6-566F7436B592} - C:\WINDOWS\addrn.dll
O2 - BHO: CNavExtBho Class - {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: MSN - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\MSN Apps\MSN Toolbar\01.02.4000.1001\it\msntb.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\programmi\google\googletoolbar1.dll
O4 - HKLM\..\Run: [ATIModeChange] Ati2mdxx.exe
O4 - HKLM\..\Run: [LaunchAp] C:\Program Files\Launch Manager\LaunchAp.exe
O4 - HKLM\..\Run: [HotkeyApp] C:\Program Files\Launch Manager\HotkeyApp.exe
O4 - HKLM\..\Run: [CtrlVol] C:\Program Files\Launch Manager\CtrlVol.exe
O4 - HKLM\..\Run: [Wbutton] "C:\Program Files\Launch Manager\Wbutton.exe"
O4 - HKLM\..\Run: [LTSMMSG] LTSMMSG.exe
O4 - HKLM\..\Run: [SynTPLpr] C:\Programmi\Synaptics\SynTP\SynTPLpr.exe
O4 - HKLM\..\Run: [SynTPEnh] C:\Programmi\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [Microsoft Works Update Detection] C:\Programmi\File comuni\Microsoft Shared\Works Shared\WkUFind.exe
O4 - HKLM\..\Run: [ccApp] "C:\Programmi\File comuni\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [NAV CfgWiz] C:\Programmi\File comuni\Symantec Shared\CfgWiz.exe /GUID NAV /CMDLINE "REBOOT"
O4 - HKLM\..\Run: [SSC_UserPrompt] C:\Programmi\File comuni\Symantec Shared\Security Center\UsrPrmpt.exe
O4 - HKLM\..\Run: [iTunesHelper] C:\Programmi\iTunes\iTunesHelper.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [Symantec NetDriver Monitor] C:\PROGRA~1\SYMNET~1\SNDMon.exe
O4 - HKLM\..\Run: [msnappau] "C:\Programmi\MSN Apps\Updater\01.02.3000.1001\it\msnappau.exe"
O4 - HKLM\..\Run: [apixt32.exe] C:\WINDOWS\apixt32.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - Global Startup: InterVideo WinCinema Manager.lnk = C:\Programmi\InterVideo\Common\Bin\WinCinemaMgr.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Programmi\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: &Cerca con Google - res://C:\Programmi\Google\GoogleToolbar1.dll/cmsearch.html
O8 - Extra context menu item: &Traduci parola in italiano - res://C:\Programmi\Google\GoogleToolbar1.dll/cmwordtrans.html
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~4\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Link a ritroso - res://C:\Programmi\Google\GoogleToolbar1.dll/cmbacklinks.html
O8 - Extra context menu item: Pagine simili - res://C:\Programmi\Google\GoogleToolbar1.dll/cmsimilar.html
O8 - Extra context menu item: Search Using Copernic Agent - C:\Programmi\Copernic Agent\Web\SearchExt.htm
O8 - Extra context menu item: Versione cache della pagina - res://C:\Programmi\Google\GoogleToolbar1.dll/cmcache.html
O9 - Extra button: (no name) - {193B17B0-7C9F-4D5B-AEAB-8D3605EFC084} - C:\PROGRA~1\COPERN~1\COPERN~1.EXE
O9 - Extra 'Tools' menuitem: Launch Copernic Agent - {193B17B0-7C9F-4D5B-AEAB-8D3605EFC084} - C:\PROGRA~1\COPERN~1\COPERN~1.EXE
O9 - Extra button: Browser Adjustment - {44627E97-789B-40d4-B5C2-58BD171129A1} - C:\PROGRA~1\Agnitum\OUTPOS~1.0\Plugins\BrowserBar\ie_bar.dll (file missing)
O9 - Extra button: Copernic Agent - {688DC797-DC11-46A7-9F1B-445F4F58CE6E} - C:\PROGRA~1\COPERN~1\COPERN~1.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
O16 - DPF: {2BC66F54-93A8-11D3-BEB6-00105AA9B6AE} (Symantec AntiVirus scanner) - http://security.symantec.com/sscv6/SharedContent/vc/bin/AvSniff.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://by17fd.bay17.hotmail.msn.com/resources/MsnPUpld.cab
O16 - DPF: {C2FCEF52-ACE9-11D3-BEBD-00105AA9B6AE} (Symantec RuFSI Registry Information Class) - http://security.symantec.com/sscv6/SharedContent/common/bin/cabsa.cab
O23 - Service: Network Security Service ( 11Fßä#·ºÄÖ`I) - Unknown owner - C:\WINDOWS\system32\d3oo32.exe
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINDOWS\System32\Ati2evxx.exe
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccEvtMgr.exe
O23 - Service: Symantec Password Validation (ccPwdSvc) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccPwdSvc.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccSetMgr.exe
O23 - Service: Servizio iPod (iPodService) - Apple Computer, Inc. - C:\Programmi\iPod\bin\iPodService.exe
O23 - Service: Servizio Norton AntiVirus Auto-Protect (navapsvc) - Symantec Corporation - C:\Programmi\Norton AntiVirus\navapsvc.exe
O23 - Service: SAVScan - Symantec Corporation - C:\Programmi\Norton AntiVirus\SAVScan.exe
O23 - Service: ScriptBlocking Service (SBService) - Symantec Corporation - C:\PROGRA~1\FILECO~1\SYMANT~1\SCRIPT~1\SBServ.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\SNDSrvc.exe
O23 - Service: SymWMI Service (SymWSC) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\Security Center\SymWSC.exe

Un'altra domanda era: ma i backup di Highjackthis con i file nocivi vanno eliminati definitivamente o sono innoqui una volta separati nella cartella backup ? Grazie

Perfetto ! Tutti i problemi sembrano essere stati risolti. Ti ringrazio di cuore per il prezioso aiuto, e ho anche imparato qualcosa di nuovo ! Ciao e grazie ancora.