Ciao a tutti.
Ho questo problema: quando navigo su una pagina più "pesa" i browser che utilizzo (qualunque, sia IE7 che FF2) sotto Vista Business, scaricano la pagina troppo lentamente e quindi o il browser la visualizza senza immagini oppure va in timeout.
Non è un problema di rete, perchè sotto Ubuntu (con la stessa configurazione di rete e stesso pc) Firefox va ottimamente.

Vi posto lo scan di HijackThis, caso mai servisse.

Logfile of HijackThis v1.99.1
Scan saved at 11.07.52, on 26/03/2008
Platform: Unknown Windows (WinNT 6.00.1904)
MSIE: Internet Explorer v7.00 (7.00.6000.16609)

Running processes:
C:\Windows\system32\Dwm.exe
C:\WINDOWS\system32\taskeng.exe
C:\Windows\Explorer.EXE
C:\Program Files\Windows Defender\MSASCui.exe
C:\Program Files\Dell\Media Experience\DMXLauncher.exe
C:\Program Files\Microsoft Office\Office12\GrooveMonitor.exe
C:\Program Files\TortoiseSVN\bin\TSVNCache.exe
C:\Program Files\Common Files\InstallShield\UpdateService\issch.exe
C:\Program Files\Nokia\Nokia PC Suite 6\LaunchApplication.exe
C:\Program Files\Creative\Mixer\CTSVolFE.exe
C:\Program Files\CyberLink\PowerDVD\DVDLauncher.exe
C:\Program Files\Java\jre1.6.0_03\bin\jusched.exe
C:\Windows\stsystra.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\Program Files\Windows Sidebar\sidebar.exe
C:\Program Files\Windows Live\Messenger\msnmsgr.exe
C:\Program Files\DAEMON Tools\daemon.exe
C:\Program Files\Windows Media Player\wmpnscfg.exe
C:\Program Files\WIDCOMM\Bluetooth Software\BTTray.exe
C:\Program Files\Last.fm\LastFMHelper.exe
C:\Windows\system32\wbem\unsecapp.exe
C:\Program Files\PC Connectivity Solution\NclBTHandler.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Windows\system32\SearchFilterHost.exe
C:\Program Files\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.live.com
R1 - HKLM\Software\Microsoft\Internet Explorer\Search,Default_Page_URL = http://www.google.it/ig/dell?hl=it&c...it&ibd=6060913
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O1 - Hosts: ::1 localhost
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Acrobat\ActiveX\AcroIEHelper.ocx
O2 - BHO: Groove GFS Browser Helper - {72853161-30C5-4D22-B7F9-0BBC1D38A37E} - C:\Program Files\Microsoft Office\Office12\GrooveShellExtensions.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.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: Windows Live Toolbar Helper - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\Windows Live Toolbar\msntb.dll
O2 - BHO: IE Developer Toolbar BHO - {CC7E636D-39AA-49b6-B511-65413DA137A1} - C:\Program Files\Microsoft\Internet Explorer Developer Toolbar\IEDevToolbar.dll
O3 - Toolbar: Windows Live Toolbar - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\Windows Live Toolbar\msntb.dll
O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
O4 - HKLM\..\Run: [DMXLauncher] C:\Program Files\Dell\Media Experience\DMXLauncher.exe
O4 - HKLM\..\Run: [GrooveMonitor] "C:\Program Files\Microsoft Office\Office12\GrooveMonitor.exe"
O4 - HKLM\..\Run: [ISUSPM Startup] "C:\Program Files\Common Files\InstallShield\UpdateService\ISUSPM.exe" -startup
O4 - HKLM\..\Run: [ISUSScheduler] "C:\Program Files\Common Files\InstallShield\UpdateService\issch.exe" -start
O4 - HKLM\..\Run: [PCSuiteTrayApplication] C:\Program Files\Nokia\Nokia PC Suite 6\LaunchApplication.exe -startup
O4 - HKLM\..\Run: [ControlCenter2.0] C:\PROGRA~1\Brother\CONTRO~1\brctrcen.exe /autorun
O4 - HKLM\..\Run: [CTSVolFE.exe] "C:\PROGRA~1\Creative\Mixer\CTSVolFE.exe" /r
O4 - HKLM\..\Run: [DVDLauncher] "C:\PROGRA~1\CYBERL~1\PowerDVD\DVDLAU~1.EXE"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_03\bin\jusched.exe"
O4 - HKLM\..\Run: [SigmatelSysTrayApp] stsystra.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKCU\..\Run: [Sidebar] C:\Program Files\Windows Sidebar\sidebar.exe /autoRun
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\Windows Live\Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [ISUSPM Startup] "C:\Program Files\Common Files\InstallShield\UpdateService\ISUSPM.exe" -startup
O4 - HKCU\..\Run: [DAEMON Tools] "C:\Program Files\DAEMON Tools\daemon.exe" -lang 1033
O4 - HKCU\..\Run: [Update Service] C:\PROGRA~1\COMMON~1\TEKNUM~1\update.exe /startup
O4 - HKCU\..\Run: [WMPNSCFG] C:\Program Files\Windows Media Player\WMPNSCFG.exe
O4 - Startup: Last.fm Helper.lnk = C:\Program Files\Last.fm\LastFMHelper.exe
O4 - Global Startup: BTTray.lnk = ?
O8 - Extra context menu item: &Windows Live Search - res://C:\Program Files\Windows Live Toolbar\msntb.dll/search.htm
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~3\Office12\EXCEL.EXE/3000
O8 - Extra context menu item: Invia a periferica &Bluetooth... - C:\PROGRA~1\WIDCOMM\Bluetooth Software\btsendto_ie_ctx.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra button: Blog This - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra 'Tools' menuitem: &Blog This in Windows Live Writer - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra button: IE Developer Toolbar - {48FFE35F-36D9-44bd-A6CC-1D34414EAC0D} - C:\Program Files\Microsoft\Internet Explorer Developer Toolbar\IEDevToolbar.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
O10 - Unknown file in Winsock LSP: c:\windows\system32\nlaapi.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\napinsp.dll
O11 - Options group: [INTERNATIONAL] International*
O13 - Gopher Prefix:
O16 - DPF: {485D813E-EE26-4DF8-9FAF-DEDF2885306E} (NSHelp Class) - http://archimede/ConnectComputer/nshelp.dll
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsof...?1158825022093
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/ge...sh/swflash.cab
O16 - DPF: {E6ACF817-0A85-4EBE-9F0A-096C6488CFEA} (NTR ActiveX 1.1.8) - http://eu.ntrsupport.com/inquiero/mo...ivex118_24.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{048F9245-E082-4C0F-9250-2FB32A51F407}: NameServer = 10.24.220.253
O17 - HKLM\System\CCS\Services\Tcpip\..\{C03E7759-E7AD-4AB7-9C7E-94F4F794B0DC}: NameServer = 10.24.220.253
O17 - HKLM\System\CS1\Services\Tcpip\..\{048F9245-E082-4C0F-9250-2FB32A51F407}: NameServer = 10.24.220.253
O17 - HKLM\System\CS2\Services\Tcpip\..\{048F9245-E082-4C0F-9250-2FB32A51F407}: NameServer = 10.24.220.253
O18 - Protocol: grooveLocalGWS - {88FED34C-F0CA-4636-A375-3CB6248B04CD} - C:\Program Files\Microsoft Office\Office12\GrooveSystemServices.dll
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\WI1F86~1\MESSEN~1\MSGRAP~1.DLL
O18 - Protocol: ms-help - {314111C7-A502-11D2-BBCA-00C04F8EC294} - C:\Program Files\Common Files\Microsoft Shared\Help\hxds.dll
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\WI1F86~1\MESSEN~1\MSGRAP~1.DLL
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O18 - Filter: application/x-internet-signup - {A173B69A-1F9B-4823-9FDA-412F641E65D6} - C:\Program Files\Tiscali\Tiscali Internet\dlls\tiscalifilter.dll
O18 - Filter hijack: text/xml - {807563E5-5146-11D5-A672-00B0D022E945} - C:\PROGRA~1\COMMON~1\MICROS~1\OFFICE12\MSOXMLMF.DL L
O20 - Winlogon Notify: WgaLogon - C:\Windows\SYSTEM32\WgaLogon.dll
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - C:\Windows\system32\wpdshserviceobj.dll
O23 - Service: Bluetooth Service (btwdins) - Broadcom Corporation. - C:\Program Files\WIDCOMM\Bluetooth Software\bin\btwdins.exe
O23 - Service: Creative Labs Licensing Service - Creative Labs - C:\Program Files\Common Files\Creative Labs Shared\Service\CreativeLicensing.exe
O23 - Service: Intel(R) PROSet/Wireless Event Log (EvtEng) - Intel Corporation - C:\Program Files\Intel\Wireless\Bin\EvtEng.exe
O23 - Service: Macromedia Licensing Service - Unknown owner - C:\Program Files\Common Files\Macromedia Shared\Service\Macromedia Licensing.exe
O23 - Service: NICCONFIGSVC - Dell Inc. - C:\Program Files\Dell\QuickSet\NicConfigSvc.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\SYSTEM32\SPOOL\DRIVERS\W32X86\3\HPZipm1 2.exe
O23 - Service: @%SystemRoot%\system32\qwave.dll,-1 (QWAVE) - Unknown owner - %windir%\system32\svchost.exe (file missing)
O23 - Service: Intel(R) PROSet/Wireless Registry Service (RegSrvc) - Intel Corporation - C:\Program Files\Intel\Wireless\Bin\RegSrvc.exe
O23 - Service: @%SystemRoot%\system32\seclogon.dll,-7001 (seclogon) - Unknown owner - %windir%\system32\svchost.exe (file missing)
O23 - Service: ServiceLayer - Nokia. - C:\Program Files\PC Connectivity Solution\ServiceLayer.exe
O23 - Service: @%ProgramFiles%\Windows Media Player\wmpnetwk.exe,-101 (WMPNetworkSvc) - Unknown owner - %ProgramFiles%\Windows Media Player\wmpnetwk.exe (file missing)

Grazie per l'aiuto!
Marco