tognazzi grazie per l'aiuto...
ho fatto quello che mi hai detto, o almeno quanto ho capito...
sono arrivata a trovare il log e non so più come andare avanti!

Logfile of HijackThis v1.99.1
Scan saved at 14.54.36, on 21/05/07
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16414)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\WIDCOMM\Software Bluetooth\bin\btwdins.exe
C:\Programmi\NavNT\defwatch.exe
C:\WINDOWS\system32\cba\pds.exe
C:\Programmi\NavNT\rtvscan.exe
C:\Programmi\Analog Devices\SoundMAX\SMAgent.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\MsPMSPSv.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\cba\xfr.exe
C:\WINDOWS\system32\MsgSys.EXE
C:\Programmi\Analog Devices\SoundMAX\SMax4PNP.exe
C:\Programmi\Analog Devices\SoundMAX\Smax4.exe
C:\WINDOWS\AGRSMMSG.exe
C:\Programmi\Apoint2K\Apoint.exe
C:\WINDOWS\system32\igfxtray.exe
C:\WINDOWS\system32\hkcmd.exe
C:\Programmi\HPQ\Quick Launch Buttons\EabServr.exe
C:\Programmi\hpq\HP Wireless Assistant\HP Wireless Assistant.exe
C:\Programmi\NavNT\vptray.exe
C:\Programmi\QuickTime\qttask.exe
C:\Programmi\iTunes\iTunesHelper.exe
C:\PROGRA~1\MSNMES~1\msnmsgr.exe
C:\Programmi\Messenger\msmsgs.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\File comuni\Ahead\Lib\NMBgMonitor.exe
C:\Programmi\CASIO\Photo Loader\Plauto.exe
C:\Programmi\Mustek 1200 UB Plus\Driver\WATCH.exe
C:\Programmi\Apoint2K\Apntex.exe
C:\Programmi\iPod\bin\iPodService.exe
C:\Programmi\HPQ\shared\hpqwmi.exe
C:\WINDOWS\system32\wuauclt.exe
C:\WINDOWS\system32\svchost.exe
C:\Documents and Settings\francesca\Desktop\HijackThis.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 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
R3 - URLSearchHook: SweetIM For Internet Explorer - {BC4FFE41-DE9F-46fa-B455-AAD49B9F9938} - C:\Programmi\Macrogaming\SweetIMBarForIE\toolbar.d ll
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: SWEETIE - {1A0AADCD-3A72-4b5f-900F-E3BB5A838E2A} - C:\PROGRA~1\MACROG~1\SWEETI~1\toolbar.dll
O2 - BHO: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O3 - Toolbar: SweetIM For Internet Explorer - {BC4FFE41-DE9F-46fa-B455-AAD49B9F9938} - C:\Programmi\Macrogaming\SweetIMBarForIE\toolbar.d ll
O4 - HKLM\..\Run: [SoundMAXPnP] C:\Programmi\Analog Devices\SoundMAX\SMax4PNP.exe
O4 - HKLM\..\Run: [SoundMAX] "C:\Programmi\Analog Devices\SoundMAX\Smax4.exe" /tray
O4 - HKLM\..\Run: [AGRSMMSG] AGRSMMSG.exe
O4 - HKLM\..\Run: [Apoint] C:\Programmi\Apoint2K\Apoint.exe
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [Cpqset] C:\Programmi\HPQ\Default Settings\cpqset.exe
O4 - HKLM\..\Run: [eabconfg.cpl] C:\Programmi\HPQ\Quick Launch Buttons\EabServr.exe /Start
O4 - HKLM\..\Run: [hpWirelessAssistant] C:\Programmi\hpq\HP Wireless Assistant\HP Wireless Assistant.exe
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [vptray] C:\Programmi\NavNT\vptray.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\Programmi\File comuni\Ahead\Lib\NeroCheck.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "C:\Programmi\iTunes\iTunesHelper.exe"
O4 - HKCU\..\Run: [msnmsgr] "C:\PROGRA~1\MSNMES~1\msnmsgr.exe" /background
O4 - HKCU\..\Run: [MSMSGS] "C:\Programmi\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Programmi\File comuni\Ahead\Lib\NMBgMonitor.exe"
O4 - Global Startup: Avvio veloce di Adobe Reader.lnk = C:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: Photo Loader residente.lnk = C:\Programmi\CASIO\Photo Loader\Plauto.exe
O4 - Global Startup: Watch.lnk = C:\Programmi\Mustek 1200 UB Plus\Driver\WATCH.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~3\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0\bin\npjpi150.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0\bin\npjpi150.dll
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~3\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O11 - Options group: [INTERNATIONAL] International*
O16 - DPF: {2917C986-0823-11D5-BF43-00A0C90DFAE5} (MciAcxOpera Control) - file://D:\level3\mciOpera.cab
O16 - DPF: {4ED9DDF0-7479-4BBE-9335-5A1EDB1D8A21} - http://download.mcafee.com/molbin/sh...0/mcinsctl.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://fracchia0903.spaces.msn.com//...d/MsnPUpld.cab
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://acs.pandasoftware.com/actives...ree/asinst.cab
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://www.messenger.it/download/Msn...Downloader.cab
O16 - DPF: {BCC0FF27-31D9-4614-A68E-C18E1ADA4389} - http://download.mcafee.com/molbin/sh...23/mcgdmgr.cab
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: widimg - {EE7C2AFF-5742-44FF-BD0E-E521B0D3C3BA} - C:\WINDOWS\system32\btxppanel.dll
O20 - AppInit_DLLs: C:\PROGRA~1\Google\GOOGLE~1\GOEC62~1.DLL
O20 - Winlogon Notify: igfxcui - C:\WINDOWS\SYSTEM32\igfxsrvc.dll
O20 - Winlogon Notify: NavLogon - C:\WINDOWS\system32\NavLogon.dll
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:\Programmi\WIDCOMM\Software Bluetooth\bin\btwdins.exe
O23 - Service: DefWatch - Symantec Corporation - C:\Programmi\NavNT\defwatch.exe
O23 - Service: HP WMI Interface (hpqwmi) - Hewlett-Packard Development Company, L.P. - C:\Programmi\HPQ\shared\hpqwmi.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programmi\File comuni\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Intel File Transfer - Intel Corporation - C:\WINDOWS\system32\cba\xfr.exe
O23 - Service: Intel PDS - Intel Corporation - C:\WINDOWS\system32\cba\pds.exe
O23 - Service: iPod Service - Apple Computer, Inc. - C:\Programmi\iPod\bin\iPodService.exe
O23 - Service: Norton AntiVirus Server - Symantec Corporation - C:\Programmi\NavNT\rtvscan.exe
O23 - Service: SoundMAX Agent Service (SoundMAX Agent Service (default)) - Analog Devices, Inc. - C:\Programmi\Analog Devices\SoundMAX\SMAgent.exe

non sono molto pratica!

grazie!