Ciao a tutti.
Per un "programma fantasma" che non vuole saperne di chiudersi, mi è stato suggerito di chiedere consiglio su questo forum.
Ecco il log
Logfile of HijackThis v1.99.1
Scan saved at 19.49.58, on 10/12/2006
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

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\Explorer.EXE
C:\WINDOWS\System32\brsvc01a.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\System32\brss01a.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\ZoneLabs\vsmon.exe
C:\WINDOWS\TBPanel.exe
E:\Programmi\SPAMfighter\SFAgent.exe
C:\WINDOWS\Mixer.exe
C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\fpdisp5a.exe
E:\Programmi\Hewlett-Packard\HP Share-to-Web\hpgs2wnd.exe
C:\Programmi\File comuni\Microsoft Shared\Works Shared\WkUFind.exe
E:\Programmi\ZoneAlarm\zlclient.exe
E:\Programmi\Hewlett-Packard\HP Share-to-Web\hpgs2wnf.exe
C:\WINDOWS\System32\msiexec.exe
E:\Programmi\Spyware Terminator\SpywareTerminatorShield.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Programmi\Messenger\msmsgs.exe
C:\Programmi\File comuni\Ahead\Lib\NMBgMonitor.exe
C:\Programmi\File comuni\Ahead\Lib\NMIndexStoreSvr.exe
E:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
C:\Programmi\Google\Google Updater\GoogleUpdater.exe
E:\Programmi\Spyware Terminator\SpywareTerminator.exe
C:\WINDOWS\System32\wuauclt.exe
C:\WINDOWS\System32\wuauclt.exe
C:\Programmi\Internet Explorer\iexplore.exe
F:\utility-non modificare mai\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.it/
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - E:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - e:\Programmi\Spybot - Search & Destroy\SDHelper.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\programmi\google\googletoolbar1.dll
O2 - BHO: Web Desk - {BD2E165D-1BC6-23AA-345B-1C234F173CBD} - (no file)
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\programmi\google\googletoolbar1.dll
O4 - HKLM\..\Run: [KAVPersonal50] e:\Programmi\Kaspersky Lab\Kaspersky Anti-Virus Personal\kav.exe /minimize
O4 - HKLM\..\Run: [Gainward] C:\WINDOWS\TBPanel.exe /A
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [SPAMfighter Agent] "E:\Programmi\SPAMfighter\SFAgent.exe" update delay 60
O4 - HKLM\..\Run: [C-Media Mixer] Mixer.exe /startup
O4 - HKLM\..\Run: [Schedulatore di FinePrint v5] C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\fpdisp5a.exe
O4 - HKLM\..\Run: [Share-to-Web Namespace Daemon] E:\Programmi\Hewlett-Packard\HP Share-to-Web\hpgs2wnd.exe
O4 - HKLM\..\Run: [Microsoft Works Update Detection] C:\Programmi\File comuni\Microsoft Shared\Works Shared\WkUFind.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\Programmi\File comuni\Ahead\Lib\NeroCheck.exe
O4 - HKLM\..\Run: [Zone Labs Client] E:\Programmi\ZoneAlarm\zlclient.exe
O4 - HKLM\..\Run: [SpywareTerminator] "E:\Programmi\Spyware Terminator\SpywareTerminatorShield.exe"
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Programmi\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Programmi\File comuni\Ahead\Lib\NMBgMonitor.exe"
O4 - Global Startup: Avvio veloce di Adobe Reader.lnk = E:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: Google Updater.lnk = C:\Programmi\Google\Google Updater\GoogleUpdater.exe
O4 - Global Startup: Microsoft Office.lnk = E:\Programmi\Microsoft Office\Office\OSA9.EXE
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - E:\PROGRA~1\MICROS~1\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\MSMSGS.EXE
O9 - Extra 'Tools' menuitem: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\MSMSGS.EXE
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1164584389764
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/muweb_site.cab?1165216399574
O23 - Service: BrSplService (Brother XP spl Service) - brother Industries Ltd - C:\WINDOWS\System32\brsvc01a.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Programmi\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: kavsvc - Kaspersky Lab - e:\Programmi\Kaspersky Lab\Kaspersky Anti-Virus Personal\kavsvc.exe
O23 - Service: NBService - Nero AG - C:\Programmi\Nero\Nero 7\Nero BackItUp\NBService.exe
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: TuneUp WinStyler Theme Service (TUWinStylerThemeSvc) - TuneUp Software GmbH - E:\Programmi\TuneUp Utilities 2006\WinStylerThemeSvc.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs, LLC - C:\WINDOWS\system32\ZoneLabs\vsmon.exe


grazie,

Ciao, avvia il computer in modalità provvisoria e cancella questa riga:

<font color=red>O2 - BHO: Web Desk - {BD2E165D-1BC6-23AA-345B-1C234F173CBD} - (no file)
</font id=red>

Se non si cancella bisognerà seguire altre procedure.
Dovresti installare il sp2 e aggiornare Internet con Windows Update.
Poi pulisci i file temporanei internet, la cronologia e i cookies.

---

Ciao.
Ho seguito le indicazioni, ma il problema non si è risolto.
Attalmente non ho creato un nuovo punto di ripristino. Lo dico perché si possa capire meglio a che punto ero arrivato nell'esecuzione delle istruzioni.

scusate mi per il messaggio doppio, ma quando lo inoltro mi compare un messaggio di errore (There was an error = Overflow) con l'invito a ripetere iil tutto; a quanto vedo, però , il messaggio è stato correttamente inoltrato...

Ringrazio P2 e il moderatore per le risposte.
Ho risolto il problema ripetendo con maggiore cura la scansione del PC ed eliminando la riga indicatami.
Ciao