Ecco il log :

Logfile of HijackThis v1.99.1
Scan saved at 21.14.51, on 13/08/2006
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

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:\acer\KnobService.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
C:\Programmi\Alwil Software\Avast4\ashServ.exe
D:\programmi di sicurezza\ewido\ewido anti-malware\ewidoctrl.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\File comuni\Microsoft Shared\VS7Debug\mdm.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\ScsiAccess.EXE
C:\Programmi\Alcohol Soft\Alcohol 52\StarWind\StarWindService.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe
C:\Programmi\Alwil Software\Avast4\ashWebSv.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\ACER\MPS.EXE
C:\acer\KnobMonitor.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Aspire\WFTVFM\WFWIZ.exe
C:\WINDOWS\Temp\brvl1.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\Kodak\KODAK Software Updater\7288971\Program\backWeb-7288971.exe
C:\Programmi\Kodak\Kodak EasyShare software\bin\EasyShare.exe
D:\stampante\Digital Imaging\bin\hpotdd01.exe
D:\stampante\Digital Imaging\bin\hpohmr08.exe
C:\Programmi\ADSL\StarModem ADSL USB MODEM\dslmon.exe
D:\ATnotes\ATnotes.exe
D:\stampante\Digital Imaging\bin\hpoevm08.exe
D:\stampante\Digital Imaging\Bin\hpoSTS08.exe
C:\Programmi\Internet Explorer\iexplore.exe
C:\Programmi\WinRAR\WinRAR.exe
C:\DOCUME~1\ANTONI~1\IMPOST~1\Temp\Rar$EX01.187\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://www.virgilio.it/free
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.it/
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
F2 - REG:system.ini: UserInit=C:\WINDOWS\system32\Userinit.exe
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - D:\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - D:\PROGRA~1\SPYBOT~1\SPYBOT~1\SDHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programmi\Java\jre1.5.0_06\bin\ssv.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\programmi\google\googletoolbar.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\programmi\google\googletoolbar.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [SSER] sser.exe
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [MPS] C:\ACER\MPS.EXE
O4 - HKLM\..\Run: [KnobMonitor] C:\acer\KnobMonitor.exe
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [Aspire Schedule] C:\Program Files\Aspire\WFTVFM\WFWIZ.exe
O4 - HKLM\..\Run: [9xadiras] 9xadiras.exe
O4 - HKLM\..\Run: [2kadiras] 2kadiras.exe
O4 - HKLM\..\Run: [brvl1.exe] C:\WINDOWS\Temp\brvl1.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [PcSync] D:\nokia\Nokia PC Suite 6\PcSync2.exe /NoDialog
O4 - Startup: ATnotes.lnk = D:\ATnotes\ATnotes.exe
O4 - Global Startup: Kodak software updater.lnk = C:\Programmi\Kodak\KODAK Software Updater\7288971\Program\backWeb-7288971.exe
O4 - Global Startup: Kodak EasyShare software.lnk = C:\Programmi\Kodak\Kodak EasyShare software\bin\EasyShare.exe
O4 - Global Startup: hpoddt01.exe.lnk = ?
O4 - Global Startup: hp psc 1000 series.lnk = ?
O4 - Global Startup: DSLMON.lnk = ?
O8 - Extra context menu item: &Google Search - res://C:\Programmi\Google\googletoolbar.dll/cmsearch.html
O8 - Extra context menu item: Backward &Links - res://C:\Programmi\Google\googletoolbar.dll/cmbacklinks.html
O8 - Extra context menu item: Cac&hed Snapshot of Page - res://C:\Programmi\Google\googletoolbar.dll/cmcache.html
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://D:\MICROS~1\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Si&milar Pages - res://C:\Programmi\Google\googletoolbar.dll/cmsimilar.html
O8 - Extra context menu item: Translate into English - res://C:\Programmi\Google\googletoolbar.dll/cmtrans.html
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_06\bin\ssv.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
O14 - IERESET.INF: START_PAGE_URL=http://www.virgilio.it/free
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {31B7EB4E-8B4B-11D1-A789-00A0CC6651A8} (Cult3D ActiveX Player) - http://www.cult3d.com/download/cult.cab
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/muweb_site.cab?1136242066640
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/MsnMessengerSetupDownloader.cab
O16 - DPF: {E61135DF-716D-49A7-B29B-8287A1CD072C} (WidelookX Control) - http://quattroruote.immanens.com/it/widelook/widelookX.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{00B80CB8-0F50-4A65-9C1D-69226D0203A8}: NameServer = 193.70.152.15 193.70.152.25
O17 - HKLM\System\CS4\Services\Tcpip\..\{00B80CB8-0F50-4A65-9C1D-69226D0203A8}: NameServer = 193.70.152.15 193.70.152.25
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O23 - Service: Adobe LM Service - Adobe Systems - C:\Programmi\File comuni\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - C:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: ewido security suite control - ewido networks - D:\programmi di sicurezza\ewido\ewido anti-malware\ewidoctrl.exe
O23 - Service: Knob Service (KNOBSERV) - Acer Inc. - c:\acer\KnobService.exe
O23 - Service: LogWif - Unknown owner - \\?\C:\Programmi\File comuni\Microsoft Shared\com7.exe (file missing)
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: ScsiAccess - Unknown owner - C:\WINDOWS\system32\ScsiAccess.EXE

Grazie (vista la data.....BUON FERRAGOSTO!!)