Oh, finalmente sono riuscito a fare tutto quello che mi hai suggerito.
Fatto il ripristino, scansionato con AdwCleaner e Hijack This.
Ora, quando apro la prima volta Chrome la home page di Google si carica in circa 15" (la seconda pagina in 1/2 secondo)
Se chiudo Chrome poi lo riapro la home page di Google si carica in circa soli 5"
Provando ad aprire Internet Explorer la home page di msn.com viene caricata in circa 9"
Ho provato anche, su Chrome, a disattivare l'unica estensione di Avast, ma il risultato non è cambiato.
Di seguito i log di AdwCleaner e Hijack This.
# AdwCleaner v4.104 - Rapporto creato 05/12/2014 in 19:32:30
# Aggiornato 05/12/2014 di Xplode
# Database : 2014-12-03.1 [Live]
# Sistema operativo : Windows 7 Ultimate Service Pack 1 (32 bits)
# Nome utente : Roberto - ROBERTO-PC
# In esecuzione da : C:\Users\Roberto\Desktop\adwcleaner_4.104.exe
# Opzione : Pulisci
***** [ Servizi ] *****
***** [ File / Cartelle ] *****
***** [ Compiti ] *****
***** [ Collegamenti ] *****
***** [ Registro ] *****
Chiave Eliminati : HKCU\Software\Classes\iLivid.torrent
Chiave Eliminati : HKLM\SOFTWARE\Classes\AppID\escortApp.DLL
Chiave Eliminati : HKLM\SOFTWARE\Classes\AppID\escortEng.DLL
Chiave Eliminati : HKLM\SOFTWARE\Classes\AppID\escorTlbr.DLL
Chiave Eliminati : HKLM\SOFTWARE\Classes\AppID\esrv.EXE
Chiave Eliminati : HKLM\SOFTWARE\Classes\AppID\NCTAudioCDGrabber2.DLL
Chiave Eliminati : HKLM\SOFTWARE\Classes\AppID\secman.DLL
Chiave Eliminati : HKLM\SOFTWARE\Classes\escort.escrtBtn.1
Chiave Eliminati : HKLM\SOFTWARE\Classes\iLivid.torrent
Chiave Eliminati : HKLM\SOFTWARE\Classes\Prod.cap
Chiave Eliminati : HKLM\SOFTWARE\Classes\protector_dll.protectorbho
Chiave Eliminati : HKLM\SOFTWARE\Classes\protector_dll.protectorbho.1
Chiave Eliminati : HKLM\SOFTWARE\Classes\AppID\{4D076AB4-7562-427A-B5D2-BD96E19DEE56}
Chiave Eliminati : HKLM\SOFTWARE\Classes\AppID\{4E1E9D45-8BF9-4139-915C-9F83CC3D5921}
Chiave Eliminati : HKLM\SOFTWARE\Classes\AppID\{B12E99ED-69BD-437C-86BE-C862B9E5444D}
Chiave Eliminati : HKLM\SOFTWARE\Classes\AppID\{D7EE8177-D51E-4F89-92B6-83EA2EC40800}
Chiave Eliminati : HKLM\SOFTWARE\Classes\CLSID\{35B8892D-C3FB-4D88-990D-31DB2EBD72BD}
Chiave Eliminati : HKLM\SOFTWARE\Classes\CLSID\{5EB0259D-AB79-4AE6-A6E6-24FFE21C3DA4}
Chiave Eliminati : HKLM\SOFTWARE\Classes\CLSID\{CADAF6BE-BF50-4669-8BFD-C27BD4E6181B}
Chiave Eliminati : HKLM\SOFTWARE\Classes\Interface\{2BEF239C-752E-4001-8048-F256E0D8CD93}
Chiave Eliminati : HKLM\SOFTWARE\Classes\Interface\{3F607E46-0D3C-4442-B1DE-DE7FA4768F5C}
Chiave Eliminati : HKLM\SOFTWARE\Classes\Interface\{49C00A51-6E59-41FE-B3FA-2D2157FAD67B}
Chiave Eliminati : HKLM\SOFTWARE\Classes\Interface\{6DFF5DBA-AE3A-46DB-B301-ECFFC6DB2982}
Chiave Eliminati : HKLM\SOFTWARE\Classes\Interface\{79FB5FC8-44B9-4AF5-BADD-CCE547F953E5}
Chiave Eliminati : HKLM\SOFTWARE\Classes\Interface\{DE34CD67-F1C8-4001-9A23-B8A68F63F377}
Chiave Eliminati : HKLM\SOFTWARE\Classes\Interface\{FE0273D1-99DF-4AC0-87D5-1371C6271785}
Chiave Eliminati : HKLM\SOFTWARE\Classes\TypeLib\{4E1E9D45-8BF9-4139-915C-9F83CC3D5921}
Chiave Eliminati : HKLM\SOFTWARE\Classes\TypeLib\{93E3D79C-0786-48FF-9329-93BC9F6DC2B3}
Chiave Eliminati : HKLM\SOFTWARE\Classes\TypeLib\{D7EE8177-D51E-4F89-92B6-83EA2EC40800}
Chiave Eliminati : HKCU\Software\APN PIP
Chiave Eliminati : HKCU\Software\ilivid
Chiave Eliminati : HKCU\Software\Microsoft\Babylon
Chiave Eliminati : HKCU\Software\Myfree Codec
Chiave Eliminati : HKCU\Software\Softonic
Chiave Eliminati : HKLM\SOFTWARE\Myfree Codec
Chiave Eliminati : HKLM\SOFTWARE\PIP
Chiave Eliminati : HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Components\4B2468513CA2D6943A1A233CD3F88CE7
Chiave Eliminati : HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\3192AA38321C641458DBDAF83979D193
***** [ Browser ] *****
-\\ Internet Explorer v9.0.8112.16561
-\\ Mozilla Firefox v
-\\ Google Chrome v39.0.2171.71
[C:\Users\Roberto\AppData\Local\Google\Chrome\User Data\Default\Web Data] - Eliminati [Search Provider] : hxxp://search.babylon.com/?q={searchTerms}&affID=110819&tt=060612_6_&babsrc=SP_ss&mntrId=30b900910000000000005404a6f17e53
[C:\Users\Roberto\AppData\Local\Google\Chrome\User Data\Default\Web Data] - Eliminati [Search Provider] : hxxp://search.babylon.com/?q={searchTerms}&affID=110819&tt=060612_6_&babsrc=SP_ss&mntrId=30b900910000000000005404a6f17e53
*************************
AdwCleaner[R0].txt - [4006 octets] - [05/12/2014 19:30:28]
AdwCleaner[S0].txt - [4004 octets] - [05/12/2014 19:32:30]
########## EOF - C:\AdwCleaner\AdwCleaner[S0].txt - [4064 octets] ##########
Logfile of Trend Micro HijackThis v2.0.5
Scan saved at 19:39:15, on 05/12/2014
Platform: Windows 7 SP1 (WinNT 6.00.3505)
MSIE: Internet Explorer v9.00 (9.00.8112.16561)
Boot mode: Normal
Running processes:
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Windows\system32\taskhost.exe
C:\Windows\system32\taskeng.exe
C:\Program Files\ASUS\AI Suite II\AsRoutineController.exe
C:\Program Files\ASUS\AI Suite II\TurboV EVO\TurboVHelp.exe
C:\Windows\explorer.exe
C:\Program Files\Realtek\Audio\HDA\RtHDVCpl.exe
C:\Program Files\ASUS\ASUS Ai Charger\AiChargerAP.exe
C:\Program Files\ASUS\AI Suite II\EPU\EPUHelp.exe
C:\Program Files\NVIDIA Corporation\Display\nvtray.exe
C:\Program Files\ASUS\AI Suite II\AI Suite II.exe
C:\Program Files\ASUS\AI Suite II\Sensor\AlertHelper\AlertHelper.exe
C:\Program Files\Winamp\winampa.exe
C:\Program Files\AVAST Software\Avast\avastui.exe
C:\Program Files\Common Files\Java\Java Update\jusched.exe
C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
C:\Program Files\PicPick\picpick.exe
C:\Program Files\Microsoft Office\Office14\MSOSYNC.EXE
C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
C:\Program Files\Samsung\Kies\External\FirmwareUpdate\KiesPDLR.exe
C:\Windows\System32\StikyNot.exe
C:\Program Files\Windows Sidebar\sidebar.exe
C:\Windows\system32\wbem\unsecapp.exe
C:\PROGRA~1\WINZIP\winzip32.exe
C:\Users\Roberto\AppData\Local\Temp\HijackThisPortable\HijackThisPortable.exe
C:\Users\Roberto\AppData\Local\Temp\HijackThisPortable\HijackThisPortable.exe
C:\Users\Roberto\AppData\Local\Temp\HijackThisPortable\App\HijackThis\HijackThis.exe
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = Preserve
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL =
http://go.microsoft.com/fwlink/?LinkId=69157R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL =
http://go.microsoft.com/fwlink/?LinkId=54896R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page =
http://go.microsoft.com/fwlink/?LinkId=54896R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page =
http://go.microsoft.com/fwlink/?LinkId=69157R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: Groove GFS Browser Helper - {72853161-30C5-4D22-B7F9-0BBC1D38A37E} - C:\PROGRA~1\MICROS~3\Office14\GROOVEEX.DLL
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre7\bin\ssv.dll
O2 - BHO: avast! Online Security - {8E5E2654-AD2D-48bf-AC2D-D17F00898D06} - C:\Program Files\AVAST Software\Avast\aswWebRepIE.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - C:\Program Files\Google\Google Toolbar\GoogleToolbar_32.dll
O2 - BHO: URLRedirectionBHO - {B4F3A835-0E21-4959-BA22-42B3008E02FF} - C:\PROGRA~1\MICROS~3\Office14\URLREDIR.DLL
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre7\bin\jp2ssv.dll
O3 - Toolbar: Google Toolbar - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - C:\Program Files\Google\Google Toolbar\GoogleToolbar_32.dll
O4 - HKLM\..\Run: [RTHDVCPL] C:\Program Files\Realtek\Audio\HDA\RtHDVCpl.exe -s
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 10.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files\Common Files\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [ASUS Ai Charger] C:\Program Files\ASUS\ASUS Ai Charger\AiChargerAP.exe
O4 - HKLM\..\Run: [BCSSync] "C:\Program Files\Microsoft Office\Office14\BCSSync.exe" /DelayServices
O4 - HKLM\..\Run: [WinampAgent] "C:\Program Files\Winamp\winampa.exe"
O4 - HKLM\..\Run: [AvastUI.exe] "C:\Program Files\AVAST Software\Avast\AvastUI.exe" /nogui
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Common Files\Java\Java Update\jusched.exe"
O4 - HKCU\..\Run: [swg] "C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe"
O4 - HKCU\..\Run: [PicPick Start] C:\Program Files\PicPick\picpick.exe /startup
O4 - HKCU\..\Run: [OfficeSyncProcess] "C:\Program Files\Microsoft Office\Office14\MSOSYNC.EXE"
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
O4 - HKCU\..\Run: [] C:\Program Files\Samsung\Kies\External\FirmwareUpdate\KiesPDLR.exe
O4 - HKCU\..\Run: [RESTART_STICKY_NOTES] C:\Windows\System32\StikyNot.exe
O4 - HKCU\..\Run: [Sidebar] C:\Program Files\Windows Sidebar\sidebar.exe /autoRun
O9 - Extra button: Invia a OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\Program Files\Microsoft Office\Office14\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: I&nvia a OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\Program Files\Microsoft Office\Office14\ONBttnIE.dll
O9 - Extra button: &Note collegate di OneNote - {789FE86F-6FC4-46A1-9849-EDE0DB0C95CA} - C:\Program Files\Microsoft Office\Office14\ONBttnIELinkedNotes.dll
O9 - Extra 'Tools' menuitem: &Note collegate di OneNote - {789FE86F-6FC4-46A1-9849-EDE0DB0C95CA} - C:\Program Files\Microsoft Office\Office14\ONBttnIELinkedNotes.dll
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O11 - Options group: [ACCELERATED_GRAPHICS] Accelerated graphics
O17 - HKLM\System\CCS\Services\Tcpip\..\{18F09DA2-7CCB-45E9-97DC-3803F4AB1A8B}: NameServer = 208.67.222.222,208.67.220.220
O17 - HKLM\System\CS1\Services\Tcpip\..\{18F09DA2-7CCB-45E9-97DC-3803F4AB1A8B}: NameServer = 208.67.222.222,208.67.220.220
O17 - HKLM\System\CS2\Services\Tcpip\..\{18F09DA2-7CCB-45E9-97DC-3803F4AB1A8B}: NameServer = 208.67.222.222,208.67.220.220
O18 - Filter hijack: text/xml - {807573E5-5146-11D5-A672-00B0D022E945} - C:\Program Files\Common Files\Microsoft Shared\OFFICE14\MSOXMLMF.DLL
O23 - Service: Adobe Acrobat Update Service (AdobeARMservice) - Adobe Systems Incorporated - C:\Program Files\Common Files\Adobe\ARM\1.0\armsvc.exe
O23 - Service: ASUS Com Service (asComSvc) - Unknown owner - C:\Program Files\ASUS\AXSP\1.00.14\atkexComSvc.exe
O23 - Service: ASUS HM Com Service (asHmComSvc) - Unknown owner - C:\Program Files\ASUS\AAHM\1.00.14\aaHMSvc.exe
O23 - Service: ASUS System Control Service (AsSysCtrlService) - Unknown owner - C:\Program Files\ASUS\AsSysCtrlService\1.00.11\AsSysCtrlService.exe
O23 - Service: avast! Antivirus - AVAST Software - C:\Program Files\AVAST Software\Avast\AvastSvc.exe
O23 - Service: AvastVBox COM Service (AvastVBoxSvc) - Avast Software - C:\Program Files\AVAST Software\Avast\ng\vbox\AvastVBoxSVC.exe
O23 - Service: FsUsbExService - Teruten - C:\Windows\system32\FsUsbExService.Exe
O23 - Service: Servizio di Google Update (gupdate) (gupdate) - Google Inc. - C:\Program Files\Google\Update\GoogleUpdate.exe
O23 - Service: Servizio Google Update (gupdatem) (gupdatem) - Google Inc. - C:\Program Files\Google\Update\GoogleUpdate.exe
O23 - Service: Google Software Updater (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: Intel(R) Management and Security Application Local Management Service (LMS) - Intel Corporation - C:\Program Files\Intel\Intel(R) Management Engine Components\LMS\LMS.exe
O23 - Service: NAS PM Service (NasPmService) - BUFFALO INC. - C:\Program Files\BUFFALO\NASNAVI\nassvc.exe
O23 - Service: NVIDIA Display Driver Service (nvsvc) - NVIDIA Corporation - C:\Windows\system32\nvvsvc.exe
O23 - Service: NVIDIA Update Service Daemon (nvUpdatusService) - NVIDIA Corporation - C:\Program Files\NVIDIA Corporation\NVIDIA Update Core\daemonu.exe
O23 - Service: SBSD Security Center Service (SBSDWSCService) - Safer Networking Ltd. - C:\Program Files\Spybot - Search & Destroy\SDWinSec.exe
O23 - Service: NVIDIA Stereoscopic 3D Driver Service (Stereo Service) - NVIDIA Corporation - C:\Program Files\NVIDIA Corporation\3D Vision\nvSCPAPISvr.exe
O23 - Service: Intel(R) Management and Security Application User Notification Service (UNS) - Intel Corporation - C:\Program Files\Intel\Intel(R) Management Engine Components\UNS\UNS.exe
O23 - Service: VirIT eXplorer Lite (viritsvclite) - Unknown owner - C:\VEXPLite\viritsvc.exe (file missing)
--
End of file - 8463 bytes