ciao ho seguito il consiglio sul forum e inserisco il log da verificare grazie per l'aiuto.

Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 17:10:18, on 01/11/2011
Platform: Windows 7 SP1 (WinNT 6.00.3505)
MSIE: Internet Explorer v9.00 (9.00.8112.16421)
Boot mode: Normal

Running processes:
C:\Windows\system32\taskhost.exe
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Windows\System32\igfxtray.exe
C:\Windows\System32\hkcmd.exe
C:\Windows\System32\igfxpers.exe
C:\Program Files\AVG\AVG10\avgtray.exe
C:\Program Files\Common Files\Apple\Apple Application Support\APSDaemon.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\Common Files\Java\Java Update\jusched.exe
C:\Program Files\Common Files\Apple\Internet Services\iCloudServices.exe
C:\Program Files\Common Files\Apple\Internet Services\ApplePhotoStreams.exe
C:\Program Files\Microsoft Office\Office14\ONENOTEM.EXE
C:\Program Files\AVG\AVG10\Identity Protection\agent\bin\avgidsmonitor.exe
C:\Users\Michele\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Michele\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Michele\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\Michele\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Program Files\Trend Micro\HiJackThis\HiJackThis.exe
C:\Windows\system32\taskeng.exe
C:\Windows\system32\DllHost.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.it/
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,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
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
R3 - URLSearchHook: AVG Security Toolbar BHO - {A3BC75A2-1F87-4686-AA43-5347D756017C} - C:\Program Files\AVG\AVG10\Toolbar\IEToolbar.dll
R3 - URLSearchHook: (no name) - {ba14329e-9550-4989-b3f2-9732e92d17cc} - (no file)
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: WormRadar.com IESiteBlocker.NavFilter - {3CA2F312-6F6E-4B53-A66E-4E65E497C8C0} - C:\Program Files\AVG\AVG10\avgssie.dll
O2 - BHO: Windows Live ID Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Easy Photo Print - {9421DD08-935F-4701-A9CA-22DF90AC4EA6} - C:\Program Files\Epson Software\Easy Photo Print\EPTBL.dll
O2 - BHO: AVG Security Toolbar BHO - {A3BC75A2-1F87-4686-AA43-5347D756017C} - C:\Program Files\AVG\AVG10\Toolbar\IEToolbar.dll
O2 - BHO: URLRedirectionBHO - {B4F3A835-0E21-4959-BA22-42B3008E02FF} - C:\PROGRA~1\MICROS~2\Office14\URLREDIR.DLL
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O3 - Toolbar: Easy Photo Print - {9421DD08-935F-4701-A9CA-22DF90AC4EA6} - C:\Program Files\Epson Software\Easy Photo Print\EPTBL.dll
O3 - Toolbar: AVG Security Toolbar - {CCC7A320-B3CA-4199-B1A6-9F516DD69829} - C:\Program Files\AVG\AVG10\Toolbar\IEToolbar.dll
O4 - HKLM\..\Run: [IgfxTray] C:\Windows\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\Windows\system32\hkcmd.exe
O4 - HKLM\..\Run: [Persistence] C:\Windows\system32\igfxpers.exe
O4 - HKLM\..\Run: [AVG_TRAY] C:\Program Files\AVG\AVG10\avgtray.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [APSDaemon] "C:\Program Files\Common Files\Apple\Apple Application Support\APSDaemon.exe"
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Common Files\Java\Java Update\jusched.exe"
O4 - HKCU\..\Run: [Google Update] "C:\Users\Michele\AppData\Local\Google\Update\GoogleUpdate.exe" /c
O4 - HKCU\..\Run: [iCloudServices] C:\Program Files\Common Files\Apple\Internet Services\iCloudServices.exe
O4 - HKCU\..\Run: [ApplePhotoStreams] C:\Program Files\Common Files\Apple\Internet Services\ApplePhotoStreams.exe
O4 - Startup: OneNote 2010 Screen Clipper and Launcher.lnk = C:\Program Files\Microsoft Office\Office14\ONENOTEM.EXE
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office14\EXCEL.EXE/3000
O8 - Extra context menu item: Se&nd to OneNote - res://C:\PROGRA~1\MICROS~2\Office14\ONBttnIE.dll/105
O9 - Extra button: (no name) - {2670000A-7350-4f3c-8081-5663EE0C6C49} - (no file)
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
O10 - Unknown file in Winsock LSP: c:\program files\common files\microsoft shared\windows live\wlidnsp.dll
O10 - Unknown file in Winsock LSP: c:\program files\common files\microsoft shared\windows live\wlidnsp.dll
O11 - Options group: [ACCELERATED_GRAPHICS] Accelerated graphics
O16 - DPF: {E2883E8F-472F-4FB0-9522-AC9BF37916A7} - http://platformdl.adobe.com/NOS/getPlusPlus/1.6/gp.cab
O18 - Protocol: avgsecuritytoolbar - {F2DDE6B2-9684-4A55-86D4-E255E237B77C} - C:\Program Files\AVG\AVG10\Toolbar\IEToolbar.dll
O18 - Protocol: linkscanner - {F274614C-63F8-47D5-A4D1-FBDDE494F8D1} - C:\Program Files\AVG\AVG10\avgpp.dll
O23 - Service: ABBYY FineReader 9.0 Sprint Licensing Service (ABBYY.Licensing.FineReader.Sprint.9.0) - ABBYY - C:\Program Files\Common Files\ABBYY\FineReaderSprint\9.00\Licensing\NetworkLicenseServer.exe
O23 - Service: Adobe Acrobat Update Service (AdobeARMservice) - Adobe Systems Incorporated - C:\Program Files\Common Files\Adobe\ARM\1.0\armsvc.exe
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\AppleMobileDeviceService.exe
O23 - Service: AVG Security Toolbar Service - Unknown owner - C:\Program Files\AVG\AVG10\Toolbar\ToolbarBroker.exe
O23 - Service: AVG Firewall (avgfws) - AVG Technologies CZ, s.r.o. - C:\Program Files\AVG\AVG10\avgfws.exe
O23 - Service: AVGIDSAgent - AVG Technologies CZ, s.r.o. - C:\Program Files\AVG\AVG10\Identity Protection\Agent\Bin\AVGIDSAgent.exe
O23 - Service: AVG WatchDog (avgwd) - AVG Technologies CZ, s.r.o. - C:\Program Files\AVG\AVG10\avgwdsvc.exe
O23 - Service: Servizio Bonjour (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: EpsonBidirectionalService - SEIKO EPSON CORPORATION - C:\Program Files\Common Files\EPSON\EBAPI\eEBSVC.exe
O23 - Service: EPSON V5 Service4(04) (EPSON_EB_RPCV4_04) - SEIKO EPSON CORPORATION - C:\Program Files\Common Files\EPSON\EPW!3 SSRP\E_S50ST7.EXE
O23 - Service: EPSON V3 Service4(04) (EPSON_PM_RPCV4_04) - SEIKO EPSON CORPORATION - C:\Program Files\Common Files\EPSON\EPW!3 SSRP\E_S50RP7.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: Servizio iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Vodafone Mobile Connect Service (VMCService) - Vodafone - C:\Program Files\Vodafone\Vodafone Mobile Connect\Bin\VMCService.exe

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End of file - 8043 bytes

qualcuno sa quale file è da eliminare.....