Logfile of HijackThis v1.99.1
Scan saved at 22.36.38, on 25/03/2005
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:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
C:\WINDOWS\System32\cisvc.exe
C:\Programmi\File comuni\Microsoft Shared\VS7Debug\mdm.exe
C:\WINDOWS\System32\tcpsvcs.exe
C:\WINDOWS\system32\slserv.exe
C:\WINDOWS\System32\snmp.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\ZONELABS\vsmon.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\SOUNDMAN.EXE
C:\Programmi\QuickTime\qttask.exe
C:\WINDOWS\system32\rundll32.exe
C:\Programmi\Java\jre1.5.0\bin\jusched.exe
C:\Programmi\ZyXEL\ADSL USB Modem\CnxDslTb.exe
C:\Programmi\Startup Mechanic\StartupMonitor.exe
C:\Programmi\File comuni\Real\Update_OB\realsched.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
C:\Programmi\Zone Labs\ZoneAlarm\zlclient.exe
C:\Programmi\Messenger\msmsgs.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\Spybot - Search & Destroy\TeaTimer.exe
C:\WINDOWS\system32\cidaemon.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\Documents and Settings\Tony\Desktop\hijackthis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.tiscali.it/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.tiscali.it
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: Yahoo! Companion BHO - {02478D38-C3F9-4efb-9B51-7695ECA05670} - C:\Programmi\Yahoo!\Companion\Installs\cpn\ycomp5_5_7_0.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\programmi\google\googletoolbar1.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\programmi\google\googletoolbar1.dll
O3 - Toolbar: Yahoo! Companion - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programmi\Yahoo!\Companion\Installs\cpn\ycomp5_5_7_0.dll
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [BluetoothAuthenticationAgent] rundll32.exe bthprops.cpl,,BluetoothAuthenticationAgent
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programmi\Java\jre1.5.0\bin\jusched.exe
O4 - HKLM\..\Run: [CnxDslTaskBar] "C:\Programmi\ZyXEL\ADSL USB Modem\CnxDslTb.exe"
O4 - HKLM\..\Run: [Startup Manager Scanner] C:\Programmi\Startup Mechanic\StartupMonitor.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Programmi\File comuni\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [AVG7_CC] C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe /STARTUP
O4 - HKLM\..\Run: [AVG7_EMC] C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
O4 - HKLM\..\Run: [Zone Labs Client] "C:\Programmi\Zone Labs\ZoneAlarm\zlclient.exe"
O4 - HKCU\..\Run: [MSMSGS] "C:\Programmi\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Programmi\Spybot - Search & Destroy\TeaTimer.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Programmi\Microsoft Office\Office10\OSA.EXE
O4 - Global Startup: Adobe Reader Speed Launch.lnk = C:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: &Google Search - res://C:\Programmi\Google\GoogleToolbar1.dll/cmsearch.html
O8 - Extra context menu item: Collegamenti a ritroso - res://C:\Programmi\Google\GoogleToolbar1.dll/cmbacklinks.html
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Pagine simili - res://C:\Programmi\Google\GoogleToolbar1.dll/cmsimilar.html
O8 - Extra context menu item: Versione cache della pagina - res://C:\Programmi\Google\GoogleToolbar1.dll/cmcache.html
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0\bin\npjpi150.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0\bin\npjpi150.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
O14 - IERESET.INF: START_PAGE_URL=http://www.tiscali.it
O16 - DPF: {2057E707-FA09-451B-972F-9CFBA9F2423C} (Tiscali702) - http://www.tiscali.it/cabs/Tiscali702.cab
O16 - DPF: {4B6E3013-6E45-11D0-9309-0020AFE05CC8} (blaxxun CC3D) - http://www.blaxxun.de/services/support/download/contact5/cab/blaxxunCC3D.cab
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://www.pandasoftware.com/activescan/as5/asinst.cab
O16 - DPF: {9B03C5F1-F5AB-47EE-937D-A8EDA626F876} (Anonymizer Anti-Spyware Scanner) - http://www.anonymizer.com/anti-spyware/2.6/freescanner/WebAAS.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{6F739B96-09ED-4BC1-854F-72EE7FF29F6B}: NameServer = 195.130.224.18,195.130.225.129
O17 - HKLM\System\CCS\Services\Tcpip\..\{E72B9BB0-4012-4C3C-B902-0CF56EE90C32}: NameServer = 213.205.32.70 213.205.36.70
O23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
O23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
O23 - Service: SmartLinkService (SLService) - - C:\WINDOWS\SYSTEM32\slserv.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs Inc. - C:\WINDOWS\system32\ZONELABS\vsmon.exe

ti ringrazio molto per la risposta così rapida,Alfonso.
Questo è il log appena creato.
Per il resto,tutto quanto è indicato nel link
che mi hai fornito in collegamento,è stato da me eseguito,ma senza risultati.
grazie ancora!

okay,ho fatto la scansione anche con symantec,ma purtroppo nessuna novità:è tutto pulito.Incomincio a crederci anch'io!!!
Penso che sia un residuo di un qualcosa che ho tolto,ma non completamente.

Grazie ancora,davvero.