ciao,non e' la prima volta che mi imbatto in questo genere di problemi,sono sempre riuscito a superarli grazie al vostro aiuto...pc lento connessione a singhiozzo pagine web che non si aprono.Vi mando il log per controllo grazie:


Scan saved at 21:19:51, on 14/04/2012
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\taskeng.exe
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Windows\system32\taskhost.exe
C:\Program Files\IObit\Smart Defrag 2\SmartDefrag.exe
C:\Program Files\TuneUp Utilities 2012\TuneUpUtilitiesApp32.exe
C:\Program Files\NVIDIA Corporation\Display\nvtray.exe
C:\Program Files\GFI Software\VIPRE\SBAMTray.exe
C:\Program Files\Logitech\SetPointP\SetPoint.exe
C:\Program Files\Windows Sidebar\sidebar.exe
C:\Program Files\DAEMON Tools Lite\DTLite.exe
C:\Program Files\Common Files\LogiShrd\KHAL3\KHALMNPR.EXE
C:\Program Files\DAEMON Tools Lite\DTShellHlp.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Trend Micro\HiJackThis\HiJackThis.exe
C:\Windows\system32\DllHost.exe

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 = http://start.facemoods.com/?a=nv1&s={searchTerms}&f=4
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O2 - BHO: HP Print Enhancer - {0347C33E-8762-4905-BF09-768834316C61} - C:\Program Files\HP\Digital Imaging\Smart Web Printing\hpswp_printenhancer.dll
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre6\bin\ssv.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: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: HP Smart BHO Class - {FFFFFFFF-CF4E-4F2B-BDC2-0E72E116A856} - C:\Program Files\HP\Digital Imaging\Smart Web Printing\hpswp_BHO.dll
O4 - HKLM\..\Run: [SBAMTray] "C:\Program Files\GFI Software\VIPRE\SBAMTray.exe"
O4 - HKLM\..\Run: [APSDaemon] "C:\Program Files\Common Files\Apple\Apple Application Support\APSDaemon.exe"
O4 - HKLM\..\Run: [EvtMgr6] C:\Program Files\Logitech\SetPointP\SetPoint.exe /launchGaming
O4 - HKLM\..\Run: [SBRegRebootCleaner] "C:\Program Files\GFI Software\VIPRE\SBRC.exe"
O4 - HKLM\..\Run: [TrojanScanner] C:\Program Files\Trojan Remover\Trjscan.exe /boot
O4 - HKCU\..\Run: [Sidebar] C:\Program Files\Windows Sidebar\sidebar.exe /autoRun
O4 - HKCU\..\Run: [DAEMON Tools Lite] "C:\Program Files\DAEMON Tools Lite\DTLite.exe" -autorun
O4 - HKUS\S-1-5-19\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /autoRun (User 'SERVIZIO LOCALE')
O4 - HKUS\S-1-5-19\..\RunOnce: [mctadmin] C:\Windows\System32\mctadmin.exe (User 'SERVIZIO LOCALE')
O4 - HKUS\S-1-5-20\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /autoRun (User 'SERVIZIO DI RETE')
O4 - HKUS\S-1-5-20\..\RunOnce: [mctadmin] C:\Windows\System32\mctadmin.exe (User 'SERVIZIO DI RETE')
O4 - HKUS\S-1-5-21-3521648595-1862881087-3135078391-1008\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /autoRun (User 'UpdatusUser')
O4 - HKUS\S-1-5-21-3521648595-1862881087-3135078391-1008\..\RunOnce: [mctadmin] C:\Windows\System32\mctadmin.exe (User 'UpdatusUser')
O8 - Extra context menu item: Add to Google Photos Screensa&ver - res://C:\Windows\system32\GPhotos.scr/200
O9 - Extra button: Visualizza o nasconde HP Smart Web Printing - {DDE87865-83C5-48c4-8357-2F5B1AA84522} - C:\Program Files\HP\Digital Imaging\Smart Web Printing\hpswp_BHO.dll
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - (no file)
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - (no file)
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: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O16 - DPF: {D4B68B83-8710-488B-A692-D74B50BA558E} (Creative Software AutoUpdate Support Package 2) - http://ccfiles.creative.com/Web/softwareupdate/ocx/15113/CTPIDPDE.cab
O16 - DPF: {E705A591-DA3C-4228-B0D5-A356DBA42FBF} (Creative Software AutoUpdate 2) - http://ccfiles.creative.com/Web/softwareupdate/su2/ocx/20015/CTSUEng.cab
O16 - DPF: {F6ACF75C-C32C-447B-9BEF-46B766368D29} (Creative Software AutoUpdate Support Package) - http://ccfiles.creative.com/Web/softwareupdate/ocx/110926/CTPID.cab
O23 - Service: Adobe Flash Player Update Service (AdobeFlashPlayerUpdateSvc) - Adobe Systems Incorporated - C:\Windows\system32\Macromed\Flash\FlashPlayerUpdateService.exe
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\AppleMobileDeviceService.exe
O23 - Service: Creative ALchemy AL6 Licensing Service - Creative Labs - C:\Program Files\Common Files\Creative Labs Shared\Service\AL6Licensing.exe
O23 - Service: Creative Audio Engine Licensing Service - Creative Labs - C:\Program Files\Common Files\Creative Labs Shared\Service\CTAELicensing.exe
O23 - Service: Creative Audio Service (CTAudSvcService) - Creative Technology Ltd - C:\Program Files\Creative\Shared Files\CTAudSvc.exe
O23 - Service: Servizio iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Logitech Bluetooth Service (LBTServ) - Logitech, Inc. - C:\Program Files\Common Files\LogiShrd\Bluetooth\lbtserv.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: VIPRE Antivirus (SBAMSvc) - GFI Software - C:\Program Files\GFI Software\VIPRE\SBAMSvc.exe
O23 - Service: SB Recovery Service (SBPIMSvc) - GFI Software - C:\Program Files\GFI Software\VIPRE\SBPIMSvc.exe
O23 - Service: SBSD Security Center Service (SBSDWSCService) - Unknown owner - (no file)
O23 - Service: ServiceLayer - Nokia - C:\Program Files\PC Connectivity Solution\ServiceLayer.exe
O23 - Service: NVIDIA Stereoscopic 3D Driver Service (Stereo Service) - NVIDIA Corporation - C:\Program Files\NVIDIA Corporation\3D Vision\nvSCPAPISvr.exe
O23 - Service: TuneUp Utilities Service (TuneUp.UtilitiesSvc) - TuneUp Software - C:\Program Files\TuneUp Utilities 2012\TuneUpUtilitiesService32.exe

--
End of file - 7405 bytes

Chiudi tutti i programmi e disconnesso lanci HJT e clicca sul secondo pulsante: Do a system scan only poi metti la spunta alle voci che ti indico e alla fine clic su Fix checked.

R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://start.facemoods.com/?a=nv1&s={searchTerms}&f=4
O4 - HKLM\..\Run: [APSDaemon] "C:\Program Files\Common Files\Apple\Apple Application Support\APSDaemon.exe"
O4 - HKCU\..\Run: [DAEMON Tools Lite] "C:\Program Files\DAEMON Tools Lite\DTLite.exe" -autorun
O4 - HKUS\S-1-5-21-3521648595-1862881087-3135078391-1008\..\RunOnce: [mctadmin] C:\Windows\System32\mctadmin.exe (User 'UpdatusUser')
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - (no file)
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - (no file)

Poi fai una pulizia con Ccleaner compreso il Registro.
Installa QUESTO sw lo aggiorni e poi fai una scansione
COMPLETA non veloce, elimina quello che trova.
Fai sapere come va. Ciao