Ciao sono ancora nei guai ho scaricato Killbox ma non riesco a cancellare il file ti posto il file di log di Hijackthis cosa ne pensi
Logfile of HijackThis v1.99.1
Scan saved at 8.55.06, on 22/08/2006
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:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\drivers\trcboot.exe
C:\Programmi\lotus\notes\ntmulti.exe
C:\Programmi\Trend Micro\OfficeScan Client\ntrtscan.exe
C:\Programmi\IBM\Personal Communications\PCS_AGNT.EXE
C:\Programmi\Trend Micro\OfficeScan Client\tmlisten.exe
C:\Programmi\Trend Micro\OfficeScan Client\OfcPfwSvc.exe
C:\WINDOWS\TEMP\UHF6C8.EXE
C:\WINDOWS\system32\wuauclt.exe
C:\Documents and Settings\YI0136\Desktop\Hijackthis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 6.0\ActiveX\AcroIEHelper.dll
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [Persistence] C:\WINDOWS\system32\igfxpers.exe
O4 - HKLM\..\Run: [SoundMAXPnP] C:\Programmi\Analog Devices\Core\smax4pnp.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programmi\Java\j2re1.4.2_03\bin\jusched.exe
O4 - HKLM\..\Run: [OfficeScanNT Monitor] "C:\Programmi\Trend Micro\OfficeScan Client\pccntmon.exe" -HideWindow
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - Global Startup: Avvio veloce di Adobe Reader.lnk = C:\Programmi\Adobe\Acrobat 6.0\Reader\reader_sl.exe
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\j2re1.4.2_03\bin\npjpi142_03.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\j2re1.4.2_03\bin\npjpi142_03.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
O16 - DPF: {1E2941E3-8E63-11D4-9D5A-00902742D6E0} (iNotes Class) -
O20 - Winlogon Notify: igfxcui - C:\WINDOWS\SYSTEM32\igfxdev.dll
O23 - Service: Multi-user Cleanup Service - IBM Corp - C:\Programmi\lotus\notes\ntmulti.exe
O23 - Service: OfficeScanNT RealTime Scan (ntrtscan) - Trend Micro Inc. - C:\Programmi\Trend Micro\OfficeScan Client\ntrtscan.exe
O23 - Service: OfficeScanNT Personal Firewall (OfcPfwSvc) - Trend Micro Inc. - C:\Programmi\Trend Micro\OfficeScan Client\OfcPfwSvc.exe
O23 - Service: OfficeScanNT Listener (tmlisten) - Trend Micro Inc. - C:\Programmi\Trend Micro\OfficeScan Client\tmlisten.exe
O23 - Service: TrcBoot - Unknown owner - C:\WINDOWS\system32\drivers\trcboot.exe

secondo te può essere questo:
O23 - Service: TrcBoot - Unknown owner - C:\WINDOWS\system32\drivers\trcboot.exe
Grazie