Mi sono trovato nella directory di windows il file in oggetto. Che cos'è? L'ho eliminato anche dall'avvio mettendo rem davanti allachiave di registro.
Ecco il log di HijackThis:

Logfile of HijackThis v1.99.1
Scan saved at 20.04.02, on 20/12/2005
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\CDAC11BA.EXE
C:\Programmi\File comuni\Symantec Shared\ccProxy.exe
C:\Programmi\File comuni\Symantec Shared\ccSetMgr.exe
C:\Programmi\TOSHIBA\ConfigFree\CFSvcs.exe
C:\Programmi\Norton Internet Security\Norton AntiVirus\navapsvc.exe
C:\Programmi\Norton Internet Security\Norton AntiVirus\SAVScan.exe
C:\Programmi\File comuni\Symantec Shared\SNDSrvc.exe
C:\Programmi\Analog Devices\SoundMAX\SMAgent.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\File comuni\Symantec Shared\ccEvtMgr.exe
C:\Programmi\File comuni\Symantec Shared\Security Center\SymWSC.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\System32\hkcmd.exe
C:\WINDOWS\System32\00THotkey.exe
C:\WINDOWS\LTSMMSG.exe
C:\WINDOWS\system32\TFNF5.exe
C:\WINDOWS\system32\TPSMain.exe
C:\Programmi\TOSHIBA\TOSHIBA Controls\TFncKy.exe
C:\WINDOWS\System32\ezSP_Px.exe
C:\Programmi\File comuni\Symantec Shared\ccApp.exe
C:\WINDOWS\system32\rundll32.exe
C:\Programmi\Logitech\MouseWare\system\em_exec.exe
C:\WINDOWS\system32\TPSBattM.exe
C:\Programmi\Adobe\Acrobat 5.0\Acrobat\Acrobat.exe
C:\Programmi\File comuni\Adobe\Web\AOM.exe
C:\DOCUME~1\Fabrizio\IMPOST~1\Temp\Rar$EX00.500\HijackThis.exe
C:\Programmi\Messenger\msmsgs.exe

R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = file:///C:\Programmi\TOSHIBA\Free Update Service\splash.html
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 5.0\Acrobat\ActiveX\AcroIEHelper.ocx
O2 - BHO: Web assistant - {9ECB9560-04F9-4bbc-943D-298DDF1699E1} - C:\Programmi\File comuni\Symantec Shared\AdBlocking\NISShExt.dll
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Programmi\Norton Internet Security\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: Web assistant - {0B53EAC3-8D69-4b9e-9B19-A37C9A5676A7} - C:\Programmi\File comuni\Symantec Shared\AdBlocking\NISShExt.dll
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Programmi\Norton Internet Security\Norton AntiVirus\NavShExt.dll
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\System32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\System32\hkcmd.exe
O4 - HKLM\..\Run: [00THotkey] C:\WINDOWS\System32\00THotkey.exe
O4 - HKLM\..\Run: [000StTHK] 000StTHK.exe
O4 - HKLM\..\Run: [LTSMMSG] LTSMMSG.exe
O4 - HKLM\..\Run: [Apoint] rem C:\Programmi\Apoint2K\Apoint.exe
O4 - HKLM\..\Run: [TouchED] rem C:\Programmi\TOSHIBA\TouchED\TouchED.Exe
O4 - HKLM\..\Run: [PadTouch] rem "C:\Programmi\TOSHIBA\PadTouch\PadExe.exe
O4 - HKLM\..\Run: [TFNF5] TFNF5.exe
O4 - HKLM\..\Run: [TPSMain] TPSMain.exe
O4 - HKLM\..\Run: [TFncKy] TFncKy.exe
O4 - HKLM\..\Run: [ezShieldProtector for Px] C:\WINDOWS\System32\ezSP_Px.exe
O4 - HKLM\..\Run: [Logitech Utility] Logi_MwX.Exe
O4 - HKLM\..\Run: [ccApp] "C:\Programmi\File comuni\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [URLLSTCK.exe] C:\Programmi\Norton Internet Security\UrlLstCk.exe
O4 - HKLM\..\Run: [Symantec NetDriver Monitor] C:\PROGRA~1\SYMNET~1\SNDMon.exe /Consumer
O4 - HKLM\..\Run: [TkBellExe] rem "C:\Programmi\File comuni\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [NeroFilterCheck] rem C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [BluetoothAuthenticationAgent] rundll32.exe bthprops.cpl,,BluetoothAuthenticationAgent
O4 - HKLM\..\Run: [PCSuiteTrayApplication] rem C:\Programmi\Nokia\Nokia PC Suite 6\LaunchApplication.exe -onlytray
O4 - HKLM\..\Run: [DataLayer] rem C:\Programmi\File comuni\PCSuite\DataLayer\DataLayer.exe
O4 - HKLM\..\Run: [HDAudio] rem C:\WINDOWS\hda.exe
O4 - HKCU\..\Run: [CTFMON.EXE] rem C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [NBJ] rem "C:\Programmi\Ahead\Nero BackItUp\NBJ.exe"
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\Office\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\j2re1.4.2\bin\npjpi142.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\j2re1.4.2\bin\npjpi142.dll
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\Office\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
O12 - Plugin for .pdf: C:\Programmi\Internet Explorer\PLUGINS\nppdf32.dll
O14 - IERESET.INF: START_PAGE_URL=file:///C:\Programmi\TOSHIBA\Free Update Service\splash.html
O16 - DPF: {4D7F48C0-CB49-4EA6-97D4-04F4EACC2F3B} - http://sib1.od2.com/common/Member/ClientInstall/7.20.0003/OCI/setup.exe
O20 - Winlogon Notify: igfxcui - C:\WINDOWS\SYSTEM32\igfxsrvc.dll
O23 - Service: C-DillaCdaC11BA - Macrovision - C:\WINDOWS\System32\drivers\CDAC11BA.EXE
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccEvtMgr.exe
O23 - Service: Symantec Network Proxy (ccProxy) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccProxy.exe
O23 - Service: Symantec Password Validation (ccPwdSvc) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccPwdSvc.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccSetMgr.exe
O23 - Service: ConfigFree Service (CFSvcs) - TOSHIBA CORPORATION - C:\Programmi\TOSHIBA\ConfigFree\CFSvcs.exe
O23 - Service: Servizio Norton AntiVirus Auto-Protect (navapsvc) - Symantec Corporation - C:\Programmi\Norton Internet Security\Norton AntiVirus\navapsvc.exe
O23 - Service: SAVScan - Symantec Corporation - C:\Programmi\Norton Internet Security\Norton AntiVirus\SAVScan.exe
O23 - Service: ScriptBlocking Service (SBService) - Symantec Corporation - C:\PROGRA~1\FILECO~1\SYMANT~1\SCRIPT~1\SBServ.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\SNDSrvc.exe
O23 - Service: SoundMAX Agent Service (SoundMAX Agent Service (default)) - Analog Devices, Inc. - C:\Programmi\Analog Devices\SoundMAX\SMAgent.exe
O23 - Service: Sony SPTI Service (SPTISRV) - Sony Corporation - C:\Programmi\File comuni\Sony Shared\AVLib\Sptisrv.exe
O23 - Service: SymWMI Service (SymWSC) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\Security Center\SymWSC.exe

Ciao ,
esegui queste operazioni

1) Disattiva il ripristino di configurazione, leggi qui come fare
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=257&SH=N

2) riavvia in modalità provvisoria, leggi qui come fare
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=344&SH=N

apri HIJAC THIS ed elimina come indicato in questo articolo
http://www.aiutamici.com/software/descrizione.asp?CodSw=1175
le righe che seguono, (nel caso le righe da eliminare non compaiono in modalità provvisoria, eliminale dalla modalità normale e riavvia il computer).

==================================
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = file:///C:\Programmi\TOSHIBA\Free Update Service\splash.html
-
O4 - HKLM\..\Run: [HDAudio] rem C:\WINDOWS\hda.exe
-
O14 - IERESET.INF: START_PAGE_URL=file:///C:\Programmi\TOSHIBA\Free Update Service\splash.html
O16 - DPF: {4D7F48C0-CB49-4EA6-97D4-04F4EACC2F3B} - http://sib1.od2.com/common/Member/ClientInstall/7.20.0003/OCI/setup.exe
==================================

Con la funzione TROVA di Windows, cerca ed elimina questi file,

==================================
hda.exe
==================================


Vai a PANNELLO DI CONTROLLO e clicca su OPZIONI INTERNET
nella finestra che si apre clicca i tre pulsanti
ELIMINA COOKIES - ELIMINA FILE - CANCELLA CRONOOLOGIA

al termine utilizza i programmi AD-AWARE e SPYBOT indicati in questo articolo
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=388&SH=N

Fai una scansione con questo programma
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=1286

sempre in modalità provvisoria fai una scansione Antivirus

quindi riavvia il computer e controlla se il problema e risolto, se e tutto OK riattiva il ripristino configurazione disattivato all'inizio di questa procedura.

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Collaboratore Aiutamici