Sei sicuro che abbia installato Windows live messenger o Messenger plus live che è un bel malware.

Scarica questo programma e leggi le istruzioni per inserire il tuo log
http://www.aiutamici.com/software/descrizione.asp?CodSw=1175

Se hai installato Live Messeger, e possibile che si sia attivata la messaggistica immediata, per disattivarla leggi queste istruzioni
http://www.dotnethell.it/tips/DisableMessengerService.aspx

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alfonso_aiutamici@hotmail.it

ho lo stesso problema..non penso che centri windows live messenger perchè è da tempo che lo uso..vi posto il log

Logfile of HijackThis v1.99.1
Scan saved at 9.46.42, on 03/12/2007
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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\Lavasoft\Ad-Aware 2007\aawservice.exe
C:\Programmi\File comuni\Acronis\Schedule2\schedul2.exe
C:\Programmi\File comuni\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\Programmi\Kaspersky Lab\Kaspersky Anti-Virus 7.0\avp.exe
C:\Programmi\WIDCOMM\Software Bluetooth\bin\btwdins.exe
C:\Programmi\Diskeeper Corporation\Diskeeper\DkService.exe
C:\WINDOWS\system32\HPZipm12.exe
C:\Programmi\Alcohol Soft\Alcohol 120\StarWind\StarWindServiceAE.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\Synaptics\SynTP\SynTPEnh.exe
C:\Programmi\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\Programmi\HPQ\Quick Launch Buttons\EabServr.exe
C:\Programmi\Java\jre1.6.0_03\bin\jusched.exe
C:\Programmi\File comuni\Acronis\Schedule2\schedhlp.exe
C:\Programmi\Kaspersky Lab\Kaspersky Anti-Virus 7.0\avp.exe
C:\Programmi\WIDCOMM\Software Bluetooth\BTTray.exe
C:\Programmi\Rainlendar\Rainlendar.exe
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\Programmi\HPQ\SHARED\HPQWMI.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\Shareaza\Shareaza.exe
C:\Programmi\Diskeeper Corporation\Diskeeper\DfrgNTFS.exe
C:\Programmi\Diskeeper Corporation\Diskeeper\DkIcon.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\Programmi\Microsoft Office\OFFICE11\OUTLOOK.EXE
C:\Programmi\Microsoft Office\OFFICE11\WINWORD.EXE
C:\hijack\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.it/
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: Supporto di collegamento per Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\File comuni\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programmi\Java\jre1.6.0_03\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O4 - HKLM\..\Run: [SynTPEnh] C:\Programmi\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [ATIPTA] "C:\Programmi\ATI Technologies\ATI Control Panel\atiptaxx.exe"
O4 - HKLM\..\Run: [eabconfg.cpl] C:\Programmi\HPQ\Quick Launch Buttons\EabServr.exe /Start
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programmi\Java\jre1.6.0_03\bin\jusched.exe"
O4 - HKLM\..\Run: [Acronis Scheduler2 Service] "C:\Programmi\File comuni\Acronis\Schedule2\schedhlp.exe"
O4 - HKLM\..\Run: [Cpqset] C:\Programmi\HPQ\Default Settings\cpqset.exe
O4 - HKLM\..\Run: [AVP] "C:\Programmi\Kaspersky Lab\Kaspersky Anti-Virus 7.0\avp.exe"
O4 - HKLM\..\Run: [Ad-Watch] C:\Programmi\Lavasoft\Ad-Aware 2007\Ad-Watch2007.exe
O4 - Startup: Rainlendar.lnk = C:\Programmi\Rainlendar\Rainlendar.exe
O4 - Global Startup: BTTray.lnk = ?
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O8 - Extra context menu item: Invia a &Bluetooth - C:\Programmi\WIDCOMM\Software Bluetooth\btsendto_ie_ctx.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra button: Web Anti-Virus - {1F460357-8A94-4D71-9CA3-AA4ACF32ED8E} - C:\Programmi\Kaspersky Lab\Kaspersky Anti-Virus 7.0\SCIEPlgn.dll
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O16 - DPF: {0EB0E74A-2A76-4AB3-A7FB-9BD8C29F7F75} (CKAVWebScan Object) - http://www.kaspersky.com/kos/english/kavwebscan_unicode.cab
O16 - DPF: {66D393D5-4D80-497C-9F4F-F3839E090202} (PlayerOCX Control) - http://www.pysoft.com/Downloads/WebCamPlayerOCX.cab
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://acs.pandasoftware.com/activescan/as5free/asinst.cab
O16 - DPF: {FE0BD779-44EE-4A4B-AA2E-743C63F2E5E6} (IWinAmpActiveX Class) - http://pdl.stream.aol.com/downloads/aol/unagi/ampx_en_dl.cab
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FILECO~1\Skype\SKYPE4~1.DLL
O20 - Winlogon Notify: klogon - C:\WINDOWS\system32\klogon.dll
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - C:\WINDOWS\system32\WPDShServiceObj.dll
O23 - Service: Ad-Aware 2007 Service (aawservice) - Lavasoft AB - C:\Programmi\Lavasoft\Ad-Aware 2007\aawservice.exe
O23 - Service: Acronis Scheduler2 Service (AcrSch2Svc) - Acronis - C:\Programmi\File comuni\Acronis\Schedule2\schedul2.exe
O23 - Service: Apple Mobile Device - Apple, Inc. - C:\Programmi\File comuni\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: Kaspersky Anti-Virus 7.0 (AVP) - Unknown owner - C:\Programmi\Kaspersky Lab\Kaspersky Anti-Virus 7.0\avp.exe" -r (file missing)
O23 - Service: Bluetooth Service (btwdins) - Broadcom Corporation. - C:\Programmi\WIDCOMM\Software Bluetooth\bin\btwdins.exe
O23 - Service: Diskeeper - Diskeeper Corporation - C:\Programmi\Diskeeper Corporation\Diskeeper\DkService.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Programmi\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: HP WMI Interface (hpqwmi) - Hewlett-Packard Development Company, L.P. - C:\Programmi\HPQ\SHARED\HPQWMI.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programmi\File comuni\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Servizio iPod (iPod Service) - Apple Inc. - C:\Programmi\iPod\bin\iPodService.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: StarWind AE Service (StarWindServiceAE) - Rocket Division Software - C:\Programmi\Alcohol Soft\Alcohol 120\StarWind\StarWindServiceAE.exe

Non mettere nuovi post su vecchi argomenti altrimenti rischi di non avere risposta.
Controlla bene l'impostazione del firewall del router e leggi questa guida.
http://messenger.msn.com/Help/#LQ2
Apri un nuovo post in Adsl,flat e connettività.