non individuo qual è all'avvio, con hiJackThis:
devo dire che di questo logfile non ci capisco niente, grazie del tuo aiuto

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 18.20.15, on 19/09/2009
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v8.00 (8.00.6001.18702)
Boot mode: Normal

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:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
C:\Programmi\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\Apoint2K\Apoint.exe
C:\WINDOWS\AGRSMMSG.exe
C:\Programmi\HPQ\Quick Launch Buttons\EabServr.exe
C:\Programmi\Java\jre6\bin\jusched.exe
C:\PROGRA~1\ALICET~1\SMARTB~1\MotiveSB.exe
C:\PROGRA~1\ALICET~1\vendors\AliceRE\content\templ ate\driven~1\syncer\MCCITR~1.EXE
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Programmi\HP\HP Software Update\HPWuSchd2.exe
C:\Programmi\Yahoo!\Search Protection\SearchProtection.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\Skype\Phone\Skype.exe
C:\Programmi\WIDCOMM\Software Bluetooth\BTTray.exe
C:\Programmi\HP\Digital Imaging\bin\hpqtra08.exe
C:\Programmi\WinZip\WZQKPICK.EXE
C:\Programmi\Apoint2K\Apntex.exe
C:\Programmi\IBM\Lotus\Symphony\framework\shared\e clipse\plugins\com.ibm.productivity.tools.base.app .win32_3.0.0.20070913-1045\soffice.exe
C:\Programmi\Alice ti aiuta\bin\mpbtn.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\Bonjour\mDNSResponder.exe
C:\Programmi\WIDCOMM\Software Bluetooth\bin\btwdins.exe
C:\WINDOWS\System32\cisvc.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\Java\jre6\bin\jqs.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\Telecom Italia\WanMiniport1st\srvany.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\Programmi\Telecom Italia\WanMiniport1st\WanMiniport1st_srv.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\snmp.exe
C:\Programmi\Analog Devices\SoundMAX\SMAgent.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\Yahoo!\SoftwareUpdate\YahooAUService. exe
C:\Programmi\Skype\Plugin Manager\skypePM.exe
C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe
C:\Programmi\Alwil Software\Avast4\ashWebSv.exe
C:\WINDOWS\System32\wbem\wmiapsrv.exe
C:\Programmi\Yahoo!\Messenger\ymsgr_tray.exe
C:\Programmi\HP\Digital Imaging\bin\hpqSTE08.exe
C:\Programmi\HP\Digital Imaging\bin\hpqbam08.exe
C:\Programmi\HP\Digital Imaging\bin\hpqgpc01.exe
C:\WINDOWS\system32\cidaemon.exe
C:\Programmi\Outlook Express\msimn.exe
C:\Programmi\Messenger\msmsgs.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\Programmi\Trend Micro\HijackThis\HijackThis.exe