Grazie Alfonso, ho fatto la prova senza Emule, il problema resta lo stesso, ho anche fatto le consuete scansioni per eventuali intrusi, ma non ho trovato nulla, se non ti scoccia ti posto il log, so che hai molto da fare, rispondi quando vuoi io ti seguo sempre anche quando non pongo quesiti, ho imparato tante cose per merito tuo, e ti ringrazio comunque, ciao.
Logfile of HijackThis v1.99.1
Scan saved at 15.37.27, on 12/06/2006
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

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:\Programmi\File comuni\EPSON\EBAPI\SAgent2.exe
c:\programmi\mcafee.com\agent\mcdetect.exe
c:\PROGRA~1\mcafee.com\agent\mctskshd.exe
c:\PROGRA~1\mcafee.com\vso\mcvsrte.exe
c:\Programmi\File comuni\Microsoft Shared\VS7Debug\mdm.exe
C:\Programmi\Sony\Shared Plug-Ins\Media Manager\MSSQL$SONY_MEDIAMGR\Binn\sqlservr.exe
C:\WINDOWS\system32\slserv.exe
C:\Programmi\Analog Devices\SoundMAX\SMAgent.exe
C:\Programmi\Alcohol Soft\Alcohol 120\StarWind\StarWindService.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\PowerQuest\Drive Image 7.0\Agent\PQV2iSvc.exe
C:\WINDOWS\system32\ZoneLabs\vsmon.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\Zone Labs\ZoneAlarm\zlclient.exe
C:\PROGRA~1\mcafee.com\agent\mcagent.exe
C:\PROGRA~1\mcafee.com\vso\mcvsshld.exe
C:\Programmi\PowerISO\PWRISOVM.EXE
c:\PROGRA~1\mcafee.com\vso\mcshield.exe
c:\progra~1\mcafee.com\vso\mcvsescn.exe
C:\Programmi\BitComet\BitComet.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\Documents and Settings\User\Desktop\hijackthis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.poste.it/
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:\Programmi\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: Solid Converter PDF - {259F616C-A300-44F5-B04A-ED001A26C85C} - C:\Programmi\SolidDocuments\SolidConverterPDF\SCPDF\ExploreExtPDF.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\Programmi\Spybot - Search & Destroy\SDHelper.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\programmi\google\googletoolbar1.dll
O2 - BHO: AcroIEToolbarHelper Class - {AE7CD045-E861-484f-8273-0445EE161910} - C:\Programmi\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll
O3 - Toolbar: Adobe PDF - {47833539-D0C5-4125-9FA8-0819E2EAAC93} - C:\Programmi\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll
O3 - Toolbar: McAfee VirusScan - {BA52B914-B692-46c4-B683-905236F6F655} - c:\progra~1\mcafee.com\vso\mcvsshl.dll
O3 - Toolbar: Solid Converter PDF - {259F616C-A300-44F5-B04A-ED001A26C85C} - C:\Programmi\SolidDocuments\SolidConverterPDF\SCPDF\ExploreExtPDF.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\programmi\google\googletoolbar1.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programmi\Yahoo!\Companion\Installs\cpn\yt.dll
O4 - HKLM\..\Run: [Zone Labs Client] C:\Programmi\Zone Labs\ZoneAlarm\zlclient.exe
O4 - HKLM\..\Run: [MCAgentExe] c:\PROGRA~1\mcafee.com\agent\mcagent.exe
O4 - HKLM\..\Run: [MCUpdateExe] c:\PROGRA~1\mcafee.com\agent\mcupdate.exe
O4 - HKLM\..\Run: [VirusScan Online] "c:\PROGRA~1\mcafee.com\vso\mcvsshld.exe"
O4 - HKLM\..\Run: [VSOCheckTask] "c:\PROGRA~1\mcafee.com\vso\mcmnhdlr.exe" /checktask
O4 - HKLM\..\Run: [PWRISOVM.EXE] C:\Programmi\PowerISO\PWRISOVM.EXE
O4 - Startup: BitTorrent.lnk = C:\Programmi\BitTorrent\bittorrent.exe
O8 - Extra context menu item: &Google Search - res://c:\programmi\google\GoogleToolbar1.dll/cmsearch.html
O8 - Extra context menu item: &Translate English Word - res://c:\programmi\google\GoogleToolbar1.dll/cmwordtrans.html
O8 - Extra context menu item: Backward Links - res://c:\programmi\google\GoogleToolbar1.dll/cmbacklinks.html
O8 - Extra context menu item: Cached Snapshot of Page - res://c:\programmi\google\GoogleToolbar1.dll/cmcache.html
O8 - Extra context menu item: Convert link target to Adobe PDF - res://C:\Programmi\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convert link target to existing PDF - res://C:\Programmi\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convert selected links to Adobe PDF - res://C:\Programmi\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECaptureSelLinks.html
O8 - Extra context menu item: Convert selected links to existing PDF - res://C:\Programmi\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppendSelLinks.html
O8 - Extra context menu item: Convert selection to Adobe PDF - res://C:\Programmi\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convert selection to existing PDF - res://C:\Programmi\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convert to Adobe PDF - res://C:\Programmi\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convert to existing PDF - res://C:\Programmi\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O8 - Extra context menu item: Open with Scansoft PDF Converter 3.0 - res://C:\Programmi\ScanSoft\OmniPage15.0\PDFConverter3\IEShellExt.dll /100
O8 - Extra context menu item: Scarica con Download &Express - C:\Programmi\Download Express\Add_Url.htm
O8 - Extra context menu item: Similar Pages - res://c:\programmi\google\GoogleToolbar1.dll/cmsimilar.html
O8 - Extra context menu item: Translate Page into English - res://c:\programmi\google\GoogleToolbar1.dll/cmtrans.html
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\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
O9 - Extra button: (no name) - SolidConverterPDF - (no file) (HKCU)
O16 - DPF: {4F1D0C59-5ECC-4028-87F3-482191D2230F} - http://webcam1.coloradocollege.edu/activex/AMC.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1134230254437
O23 - Service: Acronis Scheduler2 Service (AcrSch2Svc) - Unknown owner - C:\Programmi\File comuni\Acronis\Schedule2\schedul2.exe (file missing)
O23 - Service: Adobe LM Service - Adobe Systems - C:\Programmi\File comuni\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: EPSON Printer Status Agent2 (EPSONStatusAgent2) - SEIKO EPSON CORPORATION - C:\Programmi\File comuni\EPSON\EBAPI\SAgent2.exe
O23 - Service: McAfee WSC Integration (McDetect.exe) - McAfee, Inc - c:\programmi\mcafee.com\agent\mcdetect.exe
O23 - Service: McAfee.com McShield (McShield) - Unknown owner - c:\PROGRA~1\mcafee.com\vso\mcshield.exe
O23 - Service: McAfee Task Scheduler (McTskshd.exe) - McAfee, Inc - c:\PROGRA~1\mcafee.com\agent\mctskshd.exe
O23 - Service: McAfee SecurityCenter Update Manager (mcupdmgr.exe) - McAfee, Inc - C:\PROGRA~1\McAfee.com\Agent\mcupdmgr.exe
O23 - Service: McAfee.com VirusScan Online Realtime Engine (MCVSRte) - Networks Associates Technology, Inc - c:\PROGRA~1\mcafee.com\vso\mcvsrte.exe
O23 - Service: IBM PSA Access Driver Control (PsaSrv) - Unknown owner - C:\WINDOWS\system32\PsaSrv.exe
O23 - Service: SmartLinkService (SLService) - Smart Link - C:\WINDOWS\SYSTEM32\slserv.exe
O23 - Service: SoundMAX Agent Service (SoundMAX Agent Service (default)) - Analog Devices, Inc. - C:\Programmi\Analog Devices\SoundMAX\SMAgent.exe
O23 - Service: StarWind iSCSI Service (StarWindService) - Rocket Division Software - C:\Programmi\Alcohol Soft\Alcohol 120\StarWind\StarWindService.exe
O23 - Service: TuneUp WinStyler Theme Service (TUWinStylerThemeSvc) - TuneUp Software GmbH - C:\Programmi\TuneUp Utilities 2006\WinStylerThemeSvc.exe
O23 - Service: V2i Protector - PowerQuest Corporation - C:\Programmi\PowerQuest\Drive Image 7.0\Agent\PQV2iSvc.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs, LLC - C:\WINDOWS\system32\ZoneLabs\vsmon.exe

Per me e' una novita', dimmi come faccio a sapere se vi e' un blocco, grazie ciao.

Ho fatto come suggerito,per ora tutto vbn, i siti si aprono tutti,tra un'ora o due si sapra' la verita',ti faro' sapere, grazie, a piu' tardi, ciao

Avevi ragione e' Zone Alarm che impedisce l'apertura dei siti, ma perche' lo fa solo ora? Lo uso da due anni e non mi ha mai dato questi problemi, qualcosa e' successo, forse qualche nuovo aggiornamento: sai che cosa faccio? lo disinstallo e poi lo installo nuovamente,poi vedremo, non si finisce mai di imparare,ciao amico, e grazie ancora.