ecco il logfile scusa se te lo invio così ma non riuscivo ad allegarlo
(l'ho spezzato in due parti)

Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 20.39.49, on 29/07/2010
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.17055)
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:\WINDOWS\RTHDCPL.EXE
C:\Programmi\ASUS\AI Suite\AiNap\AiNap.exe
C:\Programmi\ASUS\AI Suite\AiGear3\CpuPowerMonitor.exe
C:\Programmi\ASUS\AI Suite\EnergySaving\PwSave.exe
C:\Programmi\CyberLink\PowerDVD\PDVDServ.exe
C:\Programmi\QuickTime\qttask.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Programmi\Acronis\TrueImage\TrueImageMonitor.ex e
C:\Programmi\File comuni\Acronis\Schedule2\schedhlp.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\Programmi\Adobe\Reader 9.0\Reader\Reader_sl.exe
C:\WINDOWS\vVX1000.exe
C:\Programmi\File comuni\Real\Update_OB\realsched.exe
C:\Programmi\ASUS\AASP\1.00.59\aaCenter.exe
C:\PROGRA~1\EPSONS~1\EVENTM~1\EEventManager.exe
C:\Programmi\Spyware Doctor\pctsTray.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\TomTom HOME 2\TomTomHOMERunner.exe
C:\Programmi\Messenger\msmsgs.exe
C:\Programmi\Microsoft Encarta\Microsoft Encarta 2008 - Premium DVD\EDICT.EXE
C:\documents and settings\pc\impostazioni locali\dati applicazioni\cmksr.exe
C:\Programmi\McAfee Security Scan\2.0.181\SSScheduler.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\Auslogics\Auslogics BoostSpeed\BoostSpeed.exe
C:\Programmi\File comuni\Acronis\Schedule2\schedul2.exe
C:\WINDOWS\system32\SupportAppXL\cdrom_mon.exe
C:\Programmi\File comuni\EPSON\EBAPI\SAgent2.exe
C:\Programmi\File comuni\Microsoft Shared\VS7DEBUG\mdm.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\oodag.exe
C:\Programmi\CyberLink\Shared Files\RichVideo.exe
C:\Programmi\Microsoft\Search Enhancement Pack\SeaPort\SeaPort.exe
C:\Programmi\Alcohol Soft\Alcohol 120\StarWind\StarWindServiceAE.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\TomTom HOME 2\TomTomHOMEService.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe
C:\Programmi\Alwil Software\Avast4\ashWebSv.exe
C:\WINDOWS\system32\msiexec.exe
C:\Programmi\Trend Micro\HiJackThis\HiJackThis.exe