Dopo avermi verificato il log precedentemente inviatoti, in cui era presente azesearch, ho eseguito i tuoi tuoi suggerimenti e ho risolto il problema.
Successivamente, ho eseguito vari aggiornamenti al sistema operativo e ad alcuni programmi ed alla fine mi ritrovo il log che segue.
Ti sarei molto grato se gli dai un'occhiata.
Grazie per la tua disponibilità , ciao.
Logfile of HijackThis v1.99.1
Scan saved at 18.49.03, on 02/05/2005
Platform: Windows ME (Win9x 4.90.3000)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
C:\WINDOWS\SYSTEM\KERNEL32.DLL
C:\WINDOWS\SYSTEM\MSGSRV32.EXE
C:\WINDOWS\SYSTEM\SPOOL32.EXE
C:\WINDOWS\SYSTEM\MPREXE.EXE
C:\WINDOWS\SYSTEM\MSTASK.EXE
C:\PROGRAMMI\EXECUTIVE SOFTWARE\DISKEEPERLITE\DKSERVICE.EXE
C:\PROGRAMMI\ALWIL SOFTWARE\AVAST4\ASHSERV.EXE
C:\WINDOWS\SYSTEM\ZONELABS\VSMON.EXE
C:\WINDOWS\SYSTEM\KB891711\KB891711.EXE
C:\WINDOWS\SYSTEM\mmtask.tsk
C:\WINDOWS\SYSTEM\RPCSS.EXE
C:\WINDOWS\EXPLORER.EXE
C:\WINDOWS\TASKMON.EXE
C:\WINDOWS\SYSTEM\SYSTRAY.EXE
C:\WINDOWS\SYSTEM\ATIPTAXX.EXE
C:\WINDOWS\TPPALDR.EXE
C:\WINDOWS\RUNDLL32.EXE
C:\WINDOWS\SYSTEM\HIDSERV.EXE
C:\WINDOWS\SYSTEM\ICSMGR.EXE
C:\WINDOWS\SYSTEM\PSTORES.EXE
C:\PROGRAMMI\CYBERLINK\POWERDVD\PDVDSERV.EXE
C:\PROGRAMMI\ALWIL SOFTWARE\AVAST4\ASHWEBSV.EXE
C:\PROGRAMMI\ALWIL SOFTWARE\AVAST4\ASHMAISV.EXE
C:\PROGRAMMI\ZONE LABS\ZONEALARM\ZLCLIENT.EXE
C:\PROGRAMMI\SLYSOFT\ANYDVD\ANYDVD.EXE
C:\WINDOWS\RunDLL.exe
C:\WINDOWS\SYSTEM\E_SICN03.EXE
C:\PROGRAMMI\KWORLD\PC-TV FM\REMOTECTL.EXE
C:\WINDOWS\SYSTEM\DDHELP.EXE
C:\PROGRAMMI\WINZIP\WZQKPICK.EXE
C:\PROGRAMMI\ADOBE\ACROBAT 5.0\DISTILLR\ACROTRAY.EXE
C:\PROGRAMMI\WIDCOMM\BLUETOOTH SOFTWARE\BTTRAY.EXE
C:\PROGRAMMI\WIDCOMM\BLUETOOTH SOFTWARE\BTSTACKSERVER.EXE
C:\WINDOWS\SYSTEM\WMIEXE.EXE
C:\WINDOWS\TPPSTRAY.EXE
C:\HIJACK\HIJACKTHIS.EXE

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: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHELPER.DLL
O3 - Toolbar: @msdxmLC.dll,-1@1040,&Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\SYSTEM\MSDXM.OCX
O4 - HKLM\..\Run: [ScanRegistry] C:\WINDOWS\scanregw.exe /autorun
O4 - HKLM\..\Run: [TaskMonitor] C:\WINDOWS\taskmon.exe
O4 - HKLM\..\Run: [PCHealth] C:\WINDOWS\PCHealth\Support\PCHSchd.exe -s
O4 - HKLM\..\Run: [SystemTray] SysTray.Exe
O4 - HKLM\..\Run: [Hidserv] Hidserv.exe run
O4 - HKLM\..\Run: [LoadPowerProfile] Rundll32.exe powrprof.dll,LoadCurrentPwrScheme
O4 - HKLM\..\Run: [AtiPTA] Atiptaxx.exe
O4 - HKLM\..\Run: [OWCCardbusTray] ocbtray.exe
O4 - HKLM\..\Run: [TPP Auto Loader] C:\WINDOWS\TPPALDR.EXE
O4 - HKLM\..\Run: [AdslTaskBar] rundll32.exe stmctrl.dll,TaskBar
O4 - HKLM\..\Run: [BtStart] C:\Programmi\WIDCOMM\Bluetooth Software\bin\btstart.exe
O4 - HKLM\..\Run: [ICSMGR] ICSMGR.EXE
O4 - HKLM\..\Run: [RemoteControl] C:\Programmi\CyberLink\PowerDVD\PDVDServ.exe
O4 - HKLM\..\Run: [avast! Web Scanner] C:\PROGRA~1\ALWILS~1\AVAST4\ASHWEBSV.EXE
O4 - HKLM\..\Run: [ashMaiSv] C:\PROGRA~1\ALWILS~1\AVAST4\ashmaisv.exe
O4 - HKLM\..\Run: [Zone Labs Client] "C:\Programmi\Zone Labs\ZoneAlarm\zlclient.exe"
O4 - HKLM\..\Run: [AnyDVD] C:\PROGRAMMI\SLYSOFT\ANYDVD\ANYDVD.EXE
O4 - HKLM\..\RunServices: [LoadPowerProfile] Rundll32.exe powrprof.dll,LoadCurrentPwrScheme
O4 - HKLM\..\RunServices: [SchedulingAgent] mstask.exe
O4 - HKLM\..\RunServices: [ATIPOLAB] ati2evxx.exe
O4 - HKLM\..\RunServices: [DkService] C:\Programmi\Executive Software\DiskeeperLite\DkService.exe
O4 - HKLM\..\RunServices: [avast!] C:\Programmi\Alwil Software\Avast4\ashServ.exe
O4 - HKLM\..\RunServices: [TrueVector] C:\WINDOWS\SYSTEM\ZONELABS\VSMON.EXE -service
O4 - HKLM\..\RunServices: [KB891711] C:\WINDOWS\SYSTEM\KB891711\KB891711.EXE
O4 - HKCU\..\Run: [Taskbar Display Controls] RunDLL deskcp16.dll,QUICKRES_RUNDLLENTRY
O4 - HKCU\..\Run: [EPSON Stylus COLOR 760] C:\WINDOWS\SYSTEM\E_SICN03.EXE /A "C:\WINDOWS\SYSTEM\E_SC242.TMP"
O4 - Startup: Microsoft Office.lnk = C:\Programmi\Microsoft Office\Office10\OSA.EXE
O4 - Startup: EPSON Status Monitor 3 Environment Check.lnk = C:\WINDOWS\SYSTEM\E_SRCV03.EXE
O4 - Startup: PC-TV FM Remote Control.lnk = C:\Programmi\KWorld\PC-TV FM\RemoteCtl.exe
O4 - Startup: WinZip Quick Pick.lnk = C:\Programmi\WinZip\WZQKPICK.EXE
O4 - Startup: Acrobat Assistant.lnk = C:\Programmi\Adobe\Acrobat 5.0\Distillr\AcroTray.exe
O4 - Startup: BTTray.lnk = C:\Programmi\WIDCOMM\Bluetooth Software\BTTray.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: Send To &Bluetooth - C:\Programmi\WIDCOMM\Bluetooth Software\btsendto_ie_ctx.htm
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~1\OFFICE10\EXCEL.EXE/3000
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\PROGRA~1\MESSEN~1\MSMSGS.EXE
O9 - Extra 'Tools' menuitem: MSN Messenger Service - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\PROGRA~1\MESSEN~1\MSMSGS.EXE
O9 - Extra button: @btrez.dll,-4015@1040,Send To Bluetooth - {CCA281CA-C863-46ef-9331-5C8D4460577F} - C:\Programmi\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O9 - Extra 'Tools' menuitem: @btrez.dll,-4017@1040,Send To &Bluetooth - {CCA281CA-C863-46ef-9331-5C8D4460577F} - C:\Programmi\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O12 - Plugin for .wav: C:\PROGRA~1\INTERN~1\PLUGINS\npqtplugin.dll
O12 - Plugin for .spop: C:\PROGRA~1\INTERN~1\Plugins\NPDocBox.dll

Il log mi sembra pulito, prova a fare un controllo antivirus on line da questo indirizzo
http://security.symantec.com/default.asp?productid=symhome&langid=it&venid=sym

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Collaboratore Aiutamici