potreste dare un controllo al LOG; ho notato che nella pagina predefinita di internet compare sempre la seguente stringa, anche dopo averla cambiata -http://go.microsoft.com/fwlink/?LinkId=69157
grazie.


Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 19.22.36, on 14/09/2010
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.5730.0013)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\csrss.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\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\Avira\AntiVir Desktop\sched.exe
C:\Programmi\Avira\AntiVir Desktop\avguard.exe
C:\Programmi\IVT Corporation\BlueSoleil\BTNtService.exe
C:\Programmi\IObit\IObit Security 360\IS360srv.exe
C:\Programmi\Java\jre6\bin\jqs.exe
C:\Programmi\File comuni\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS\system32\svchost.exe
C:\Programmi\Wirelwss LAN Utility\tiwlnsvc.exe
C:\WINDOWS\system32\wdfmgr.exe
C:\WINDOWS\system32\UStorSrv.exe
C:\WINDOWS\system32\CAPRPCSK.EXE
C:\WINDOWS\system32\wscntfy.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\WINDOWS\System32\alg.exe
C:\WINDOWS\system32\pctspk.exe
C:\Programmi\CyberLink\PowerDVD\PDVDServ.exe
C:\Programmi\Java\jre6\bin\jusched.exe
C:\Programmi\Wirelwss LAN Utility\TIWLANCu.exe
C:\Programmi\ClamWin\bin\ClamTray.exe
C:\WINDOWS\VM305_STI.EXE
C:\Programmi\Avira\AntiVir Desktop\avgnt.exe
C:\WINDOWS\system32\sistray.EXE
C:\WINDOWS\system32\khooker.exe
C:\Programmi\IObit\IObit Security 360\IS360tray.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\Microsoft ActiveSync\WCESCOMM.EXE
C:\Programmi\IVT Corporation\BlueSoleil\BlueSoleil.exe
C:\WINDOWS\system32\CH_Utility.exe
C:\WINDOWS\system32\spool\drivers\w32x86\3\CAPPSWK.EXE
C:\WINDOWS\system32\spool\drivers\w32x86\3\CAPPSWK.EXE
C:\Programmi\Java\jre6\bin\jucheck.exe
C:\Programmi\Internet Explorer\iexplore.exe
C:\Programmi\File comuni\Microsoft Shared\Windows Live\WLLoginProxy.exe
C:\Programmi\Trend Micro\HiJackThis\HiJackThis.exe
C:\WINDOWS\system32\wbem\wmiprvse.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.it/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
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
R3 - URLSearchHook: RadioItalia Toolbar - {0aaeaede-aefd-4672-a764-5c5c037612a2} - C:\Programmi\RadioItalia\tbRad0.dll
R3 - URLSearchHook: WorldLiveTV Toolbar - {6bbb78ed-639b-4e9b-9c1e-2491a0ec340d} - C:\Programmi\WorldLiveTV\tbWor0.dll
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:\Programmi\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: RadioItalia Toolbar - {0aaeaede-aefd-4672-a764-5c5c037612a2} - C:\Programmi\RadioItalia\tbRad0.dll
O2 - BHO: WorldLiveTV Toolbar - {6bbb78ed-639b-4e9b-9c1e-2491a0ec340d} - C:\Programmi\WorldLiveTV\tbWor0.dll
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programmi\Java\jre6\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
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\programmi\google\googletoolbar2.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Programmi\Google\GoogleToolbarNotifier\2.0.301.7164\swg.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Programmi\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Programmi\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programmi\Yahoo!\Companion\Installs\cpn\yt.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\programmi\google\googletoolbar2.dll
O3 - Toolbar: RadioItalia Toolbar - {0aaeaede-aefd-4672-a764-5c5c037612a2} - C:\Programmi\RadioItalia\tbRad0.dll
O3 - Toolbar: WorldLiveTV Toolbar - {6bbb78ed-639b-4e9b-9c1e-2491a0ec340d} - C:\Programmi\WorldLiveTV\tbWor0.dll
O4 - HKLM\..\Run: [PCTVOICE] pctspk.exe
O4 - HKLM\..\Run: [RemoteControl] C:\Programmi\CyberLink\PowerDVD\PDVDServ.exe
O4 - HKLM\..\Run: [PinnacleDriverCheck] C:\WINDOWS\system32\PSDrvCheck.exe -CheckReg
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programmi\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [TI WLAN] C:\Programmi\Wirelwss LAN Utility\TIWLANCu.exe
O4 - HKLM\..\Run: [ClamWin] "C:\Programmi\ClamWin\bin\ClamTray.exe" --logon
O4 - HKLM\..\Run: [BigDog305] C:\WINDOWS\VM305_STI.EXE VIMICRO USB PC Camera (ZC0305)
O4 - HKLM\..\Run: [avgnt] "C:\Programmi\Avira\AntiVir Desktop\avgnt.exe" /min
O4 - HKLM\..\Run: [SiS Tray] C:\WINDOWS\system32\sistray.EXE
O4 - HKLM\..\Run: [SiS KHooker] C:\WINDOWS\system32\khooker.exe
O4 - HKLM\..\Run: [SiSUSBRG] C:\WINDOWS\sisUSBrg.exe
O4 - HKLM\..\Run: [CAPON] C:\WINDOWS\system32\Spool\Drivers\w32x86\3\CAPONN.EXE
O4 - HKLM\..\Run: [IObit Security 360] "C:\Programmi\IObit\IObit Security 360\IS360tray.exe" /autostart
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [NBJ] "C:\Programmi\Ahead\Nero BackItUp\NBJ.exe"
O4 - HKCU\..\Run: [H/PC Connection Agent] "C:\Programmi\Microsoft ActiveSync\WCESCOMM.EXE"
O4 - HKCU\..\Run: [swg] C:\Programmi\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVIZIO LOCALE')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVIZIO DI RETE')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - Global Startup: Adobe Gamma Loader.exe.lnk = C:\Programmi\File comuni\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Programmi\File comuni\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Avvio veloce di Adobe Reader.lnk = C:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: BlueSoleil.lnk = ?
O4 - Global Startup: Chrontel TV.lnk = C:\WINDOWS\system32\CH_Utility.exe
O4 - Global Startup: D-Link AirPlus.lnk = ?
O4 - Global Startup: Finestra di stato di Canon LBP-800.LNK = C:\WINDOWS\system32\spool\drivers\w32x86\3\CAPPSWK.EXE
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Crea preferiti portatile - {2EAF5BB1-070F-11D3-9307-00C04FAE2D4F} - C:\Programmi\Microsoft ActiveSync\inetrepl.dll
O9 - Extra button: (no name) - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\Programmi\Microsoft ActiveSync\inetrepl.dll
O9 - Extra 'Tools' menuitem: Crea preferiti portatile... - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\Programmi\Microsoft ActiveSync\inetrepl.dll
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\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
O17 - HKLM\System\CCS\Services\Tcpip\..\{7334E5E1-EC15-4918-989B-433A9D367A0A}: NameServer = 195.60.190.34,195.60.190.35
O22 - SharedTaskScheduler: Precaricatore Browseui - {438755C2-A8BA-11D1-B96B-00A0C90312E1} - C:\WINDOWS\system32\browseui.dll
O22 - SharedTaskScheduler: Daemon di cache delle categorie di componenti - {8C7461EF-2B13-11d2-BE35-3078302C2030} - C:\WINDOWS\system32\browseui.dll
O23 - Service: Avira AntiVir Scheduler (AntiVirScheduler) - Avira GmbH - C:\Programmi\Avira\AntiVir Desktop\sched.exe
O23 - Service: Avira AntiVir Guard (AntiVirService) - Avira GmbH - C:\Programmi\Avira\AntiVir Desktop\avguard.exe
O23 - Service: BlueSoleil Hid Service - Unknown owner - C:\Programmi\IVT Corporation\BlueSoleil\BTNtService.exe
O23 - Service: Google Update Service (gupdate) (gupdate) - Google Inc. - C:\Programmi\Google\Update\GoogleUpdate.exe
O23 - Service: IS360service - IObit - C:\Programmi\IObit\IObit Security 360\IS360srv.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Programmi\Java\jre6\bin\jqs.exe
O23 - Service: lmab_device - - C:\WINDOWS\system32\LMabcoms.exe
O23 - Service: ServiceLayer - Nokia. - C:\Programmi\PC Connectivity Solution\ServiceLayer.exe
O23 - Service: TI Wlan Service (tiwlnsvc) - Unknown owner - C:\Programmi\Wirelwss LAN Utility\tiwlnsvc.exe
O23 - Service: UStorage Server Service - OTi - C:\WINDOWS\system32\UStorSrv.exe

--
End of file - 9599 bytes

http://mondoemule.blogspot.com/2009/05/eliminare-le-toolbar-infette-e.html

fai prima tutto e poi riposta il log aggiornato ....ciao e grazie

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Che compaia la stringa non è un problema, se invece accedi a internet e ti compare la pagina di microsoft invece di quella da te impostata non è normale, riprova, apri internet explorer, digita l'indirizzo del sito che vuoi come prima pagina e dai invio, quando ti trovi sulla pagina vai a - STRUMENTI - OPZIONI INTERNET nella finestra che compare clicca su PAGINA CORRENTE e adesso dovrebbe rimanere memorizzata.

Devi installare un firewall, ti consiglio Outpost

http://software.aiutamici.com/software?ID=80361


Devi aggiornare il sistema dal windows update, segui le indicazioni che ho riportato in questa guida

http://www.aiutamici.com/ftp/software/WindowsXP_Guida.htm#2

Hai più di 4 toolbar, disinstallale, creano solo casini, al limite tienine solo una.

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alfonso_aiutamici@hotmail.it

CoolWebSearch, Mao è spesso associata a qualche toolbar. Per cui, prima di ogni cosa, direi che sarebbe meglio che disinstallasse qualche toolbar (come avevi suggerito tu e come ha confermato pure Alfonso) e poi facesse un nuovo LOG di HijackThis, così potrem capire meglio cosa veramente c'è e cosa -in conseguenza- si può fare.