Salve a tutti, avrei bisogno di leggere questo logfile, ho difficoltà a caricare internet, il resto va tutto bene.
Cordiali saluti e grazie.
Massimo

Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 12:55:28, on 27/09/2012
Platform: Windows 7 SP1 (WinNT 6.00.3505)
MSIE: Internet Explorer v9.00 (9.00.8112.16450)
Boot mode: Normal

Running processes:
C:\Windows\system32\taskhost.exe
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Program Files\Intel\Intel Matrix Storage Manager\IAAnotif.exe
C:\Windows\System32\igfxtray.exe
C:\Windows\System32\hkcmd.exe
C:\Windows\System32\igfxpers.exe
C:\Program Files\IDT\WDM\sttray.exe
C:\Windows\system32\igfxsrvc.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Program Files\Hewlett-Packard\HP Quick Launch\HPMSGSVC.exe
C:\Program Files\Hewlett-Packard\HP CloudDrive\zumodrive.exe
C:\Windows\system32\conhost.exe
C:\Program Files\DivX\DivX Update\DivXUpdate.exe
C:\Program Files\AVAST Software\Avast\AvastUI.exe
C:\Program Files\HP\HP Software Update\hpwuSchd2.exe
C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
C:\Program Files\Hewlett-Packard\HP Wireless Assistant\HPWA_Main.exe
C:\Program Files\Microsoft Office\Office12\WINWORD.EXE
C:\Users\margo\AppData\Local\Temp\Temp1_AUP_Hijack.zip\PortableApps\HiJackThis\HiJackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://g.uk.msn.com/HPCON/6
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.fastweb.it/portale/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://g.uk.msn.com/HPCON/6
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://g.uk.msn.com/HPCON/6
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
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: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre6\bin\ssv.dll
O2 - BHO: avast! WebRep - {8E5E2654-AD2D-48bf-AC2D-D17F00898D06} - C:\Program Files\AVAST Software\Avast\aswWebRepIE.dll
O2 - BHO: Guida per l'accesso a Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - C:\Program Files\Google\Google Toolbar\GoogleToolbar_32.dll
O2 - BHO: SkypeIEPluginBHO - {AE805869-2E5C-4ED4-8F7B-F1F7851A4497} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O2 - BHO: Bing Bar Helper - {d2ce3e00-f94a-4740-988e-03dc2f38c34f} - "C:\Program Files\Microsoft\BingBar\BingExt.dll" (file missing)
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
O3 - Toolbar: avast! WebRep - {8E5E2654-AD2D-48bf-AC2D-D17F00898D06} - C:\Program Files\AVAST Software\Avast\aswWebRepIE.dll
O3 - Toolbar: Bing Bar - {8dcb7100-df86-4384-8842-8fa844297b3f} - "C:\Program Files\Microsoft\BingBar\BingExt.dll" (file missing)
O3 - Toolbar: Google Toolbar - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - C:\Program Files\Google\Google Toolbar\GoogleToolbar_32.dll
O4 - HKLM\..\Run: [IAAnotif] C:\Program Files\Intel\Intel Matrix Storage Manager\iaanotif.exe
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: [SysTrayApp] C:\Program Files\IDT\WDM\sttray.exe
O4 - HKLM\..\Run: [SynTPEnh] %ProgramFiles%\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [HP Quick Launch] C:\Program Files\Hewlett-Packard\HP Quick Launch\HPMSGSVC.exe
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files\Common Files\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [ZumoDrive] "C:\Program Files\Hewlett-Packard\HP CloudDrive\ZumoLauncher.lnk"
O4 - HKLM\..\Run: [HPWirelessAssistant] C:\Program Files\Hewlett-Packard\HP Wireless Assistant\DelayedAppStarter.exe 120 C:\Program Files\Hewlett-Packard\HP Wireless Assistant\HPWA_Main.exe /hidden
O4 - HKLM\..\Run: [DivXUpdate] "C:\Program Files\DivX\DivX Update\DivXUpdate.exe" /CHECKNOW
O4 - HKLM\..\Run: [avast] "C:\Program Files\AVAST Software\Avast\avastUI.exe" /nogui
O4 - HKLM\..\Run: [HP Software Update] C:\Program Files\HP\HP Software Update\HPWuSchd2.exe
O4 - HKLM\..\Run: [Malwarebytes Anti-Malware (reboot)] "C:\Program Files\Malwarebytes' Anti-Malware\mbam.exe" /runcleanupscript
O4 - HKCU\..\Run: [Google Update] "C:\Users\margo\AppData\Local\Google\Update\GoogleUpdate.exe" /c
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Program Files\Common Files\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
O4 - Global Startup: HP Media Suite.lnk = C:\Program Files\Hewlett-Packard\HP Media Suite\Home\ArcStart.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MIF5BA~1\Office12\EXCEL.EXE/3000
O9 - Extra button: Inserisci blog - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra 'Tools' menuitem: Inserisci &blog in Windows Live Writer - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra button: Skype Plug-In - {898EA8C8-E7FF-479B-8935-AEC46303B9E5} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O9 - Extra 'Tools' menuitem: Skype Plug-In - {898EA8C8-E7FF-479B-8935-AEC46303B9E5} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MIF5BA~1\Office12\REFIEBAR.DLL
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: Add to Evernote - {E0B8C461-F8FB-49b4-8373-FE32E92528A6} - C:\Program Files\Evernote\Evernote3.5\enbar.dll
O9 - Extra 'Tools' menuitem: Add to Evernote - {E0B8C461-F8FB-49b4-8373-FE32E92528A6} - C:\Program Files\Evernote\Evernote3.5\enbar.dll
O11 - Options group: [ACCELERATED_GRAPHICS] Accelerated graphics
O18 - Protocol: skype-ie-addon-data - {91774881-D725-4E58-B298-07617B9B86A8} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O23 - Service: Adobe Flash Player Update Service (AdobeFlashPlayerUpdateSvc) - Adobe Systems Incorporated - C:\Windows\system32\Macromed\Flash\FlashPlayerUpdateService.exe
O23 - Service: Andrea ST Filters Service (AESTFilters) - Andrea Electronics Corporation - C:\Program Files\IDT\WDM\aestsrv.exe
O23 - Service: avast! Antivirus - AVAST Software - C:\Program Files\AVAST Software\Avast\AvastSvc.exe
O23 - Service: DeviceVM Meta Data Export Service (DvmMDES) - DeviceVM, Inc. - C:\SwSetup\HPQWMM\QuickWeb\QW.SYS\config\DVMExportService.exe
O23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - C:\Program Files\Common Files\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: GameConsoleService - WildTangent, Inc. - C:\Program Files\HP Games\HP Game Console\GameConsoleService.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: HP Support Assistant Service - Hewlett-Packard Company - C:\Program Files\Hewlett-Packard\HP Support Framework\hpsa_service.exe
O23 - Service: HP Wireless Assistant Service - Hewlett-Packard Company - C:\Program Files\Hewlett-Packard\HP Wireless Assistant\HPWA_Service.exe
O23 - Service: HP Quick Synchronization Service (HPDrvMntSvc.exe) - Hewlett-Packard Company - C:\Program Files\Hewlett-Packard\Shared\HPDrvMntSvc.exe
O23 - Service: HP Software Framework Service (hpqwmiex) - Hewlett-Packard Company - C:\Program Files\Hewlett-Packard\Shared\hpqWmiEx.exe
O23 - Service: HPWMISVC - Unknown owner - C:\Program Files\Hewlett-Packard\HP Quick Launch\HPWMISVC.exe
O23 - Service: Intel(R) Matrix Storage Event Monitor (IAANTMON) - Intel Corporation - C:\Program Files\Intel\Intel Matrix Storage Manager\IAANTMon.exe
O23 - Service: NitroPDFDriverCreatorReadSpool (NitroDriverReadSpool) - Nitro PDF Software - C:\Program Files\Nitro PDF\Professional\NitroPDFDriverService.exe
O23 - Service: NLS Service (nlsX86cc) - Nalpeiron Ltd. - C:\Windows\system32\NLSSRV32.EXE
O23 - Service: Macrium Reflect Image Mounting Service (ReflectService) - Unknown owner - C:\Program Files\Macrium\Reflect\ReflectService.exe
O23 - Service: Skype Updater (SkypeUpdate) - Skype Technologies - C:\Program Files\Skype\Updater\Updater.exe
O23 - Service: @%SystemRoot%\system32\stlang.dll,-10101 (STacSV) - IDT, Inc. - C:\Program Files\IDT\WDM\STacSV.exe
O23 - Service: TeamViewer 7 (TeamViewer7) - TeamViewer GmbH - C:\Program Files\TeamViewer\Version7\TeamViewer_Service.exe

--
End of file - 10263 bytes

Ciao massimob, il log è a posto ci sono delle toolbar inutili e troppe voci in avvio che possono causare rallentamenti.

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:

O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: SkypeIEPluginBHO - {AE805869-2E5C-4ED4-8F7B-F1F7851A4497} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O2 - BHO: Bing Bar Helper - {d2ce3e00-f94a-4740-988e-03dc2f38c34f} - "C:\Program Files\Microsoft\BingBar\BingExt.dll" (file missing)
O3 - Toolbar: avast! WebRep - {8E5E2654-AD2D-48bf-AC2D-D17F00898D06} - C:\Program Files\AVAST Software\Avast\aswWebRepIE.dll
O3 - Toolbar: Bing Bar - {8dcb7100-df86-4384-8842-8fa844297b3f} - "C:\Program Files\Microsoft\BingBar\BingExt.dll" (file missing)
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: [SysTrayApp] C:\Program Files\IDT\WDM\sttray.exe
O4 - HKLM\..\Run: [HP Quick Launch] C:\Program Files\Hewlett-Packard\HP Quick Launch\HPMSGSVC.exe
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files\Common Files\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [ZumoDrive] "C:\Program Files\Hewlett-Packard\HP CloudDrive\ZumoLauncher.lnk"
O4 - HKLM\..\Run: [HPWirelessAssistant] C:\Program Files\Hewlett-Packard\HP Wireless Assistant\DelayedAppStarter.exe 120 C:\Program Files\Hewlett-Packard\HP Wireless Assistant\HPWA_Main.exe /hidden
O4 - HKLM\..\Run: [DivXUpdate] "C:\Program Files\DivX\DivX Update\DivXUpdate.exe" /CHECKNOW
O4 - HKLM\..\Run: [HP Software Update] C:\Program Files\HP\HP Software Update\HPWuSchd2.exe
O4 - HKLM\..\Run: [Malwarebytes Anti-Malware (reboot)] "C:\Program Files\Malwarebytes' Anti-Malware\mbam.exe" /runcleanupscript
O4 - HKCU\..\Run: [Google Update] "C:\Users\margo\AppData\Local\Google\Update\GoogleUpdate.exe" /c
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
O4 - Global Startup: HP Media Suite.lnk = C:\Program Files\Hewlett-Packard\HP Media Suite\Home\ArcStart.exe

Svuota la cache di Internet del browser, usa Ccleaner fai una pulizia compreso il Registro.
Tieni deframmentato il disco.
Fai sapere se ci sono miglioramenti, ciao

Anche qui troppe toolbar e forse la pagina iniziale di Internet Explorer modificata.
Controlla in I.E. se hai questo indirizzo: http://search.chatzum.com, se lo trovi cancellalo e riattiva la pagina iniziale che avevi prima.
Controlla nei browser I.E. e Chrome, componenti aggiuntivi se trovi la parola search.chatzum.com, se ci sono eliminale.
Se Tiziana è tua figlia o altro, devi dire di non installare mai le toolbar e attenta a cosa scarica, i sw è meglio scaricarli da siti sicuri, es. aiutamici dove sono tutti controllati.

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 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://search.chatzum.com/
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://search.chatzum.com/
R3 - URLSearchHook: ToolbarURLSearchHook Class - {CA3EB689-8F09-4026-AA10-B9534C691CE0} - C:\Programmi\ChatZum Toolbar\tbunsl2AF.tmp\tbhelper.dll
O2 - BHO: TBSB01620 - {58124A0B-DC32-4180-9BFF-E0E21AE34026} - C:\Programmi\IMinent Toolbar\tbcore3.dll
O2 - BHO: TBSB09850 - {FCBCCB87-9224-4B8D-B117-F56D924BEB18} - C:\Programmi\ChatZum Toolbar\tbunsl2AF.tmp\tbcore3.dll
O3 - Toolbar: IMinent Toolbar - {977AE9CC-AF83-45E8-9E03-E2798216E2D5} - C:\Programmi\IMinent Toolbar\tbcore3.dll
O3 - Toolbar: avast! WebRep - {8E5E2654-AD2D-48bf-AC2D-D17F00898D06} - C:\Programmi\AVAST Software\Avast\aswWebRepIE.dll
O3 - Toolbar: ChatZum Toolbar - {37D48D9C-3F7E-412F-B5BF-611BE7CCFCA1} - C:\Programmi\ChatZum Toolbar\tbunsl2AF.tmp\tbcore3.dll
O4 - HKLM\..\Run: [AzMixerSel] C:\Programmi\Realtek\Audio\Drivers\AzMixerSel.exe
O4 - HKLM\..\Run: [SweetIM] C:\Programmi\SweetIM\Messenger\SweetIM.exe
O4 - HKLM\..\Run: [Sweetpacks Communicator] C:\Programmi\SweetIM\Communicator\SweetPacksUpdateManager.exe
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKCU\..\Run: [Google Update] "C:\Documents and Settings\Tiziana\Impostazioni locali\Dati applicazioni\Google\Update\GoogleUpdate.exe" /c
O4 - HKCU\..\Run: [Facebook Update] "C:\Documents and Settings\Tiziana\Impostazioni locali\Dati applicazioni\Facebook\Update\FacebookUpdate.exe" /c /nocrashserver
O4 - HKCU\..\Run: [MSMSGS] "C:\Programmi\Messenger\msmsgs.exe" /background

Fai una pulizia con Ccleaner compreso il Registro, per il registro spunta tutte le voci, acconsenti al backup.
Vai in C:\windows, cerca la cartella Prefetch e la svuoti completamente, non eliminare la cartella.

Disattiva il ripristino configurazione di sistema:
start,pannello di controllo,sistema,configurazione di sistema,metti la spunta a
"disattiva ripristino configurazione di sistema su tutte le unita'",applica,ok.
spegni e riaccendi il pc, (fai l’operazione inversa per riattivarlo) e crea un nuovo punto tuo.

Per creare un nuovo punto di ripristino del sistema in XP
Start - Tutti i programmi – Accessori - Utilità di sistema - Ripristino configurazione clic su Crea
nuovo punto – Avanti mettere un nome del nuovo punto poi clic su crea ok, chiudi.

Ora le connessioni dovrebbero essere più veloci, fai sapere, ciao.