Invio il log, mi date una occhiata perche ogni tanto mi si sconnette internet, grazie
Logfile of HijackThis v1.98.2
Scan saved at 16.05.32, on 17/11/2004
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:\Programmi\File comuni\Symantec Shared\ccSetMgr.exe
C:\Programmi\Executive Software\DiskeeperLite\DKService.exe
C:\Programmi\File comuni\EPSON\EBAPI\SAgent2.exe
C:\WINDOWS\System32\mgabg.exe
C:\Programmi\Norton AntiVirus\navapsvc.exe
C:\Programmi\Norton AntiVirus\SAVScan.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\File comuni\Symantec Shared\ccEvtMgr.exe
C:\Programmi\File comuni\Symantec Shared\Security Center\SymWSC.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\System32\PDesk\PDesk.exe
C:\Programmi\Thomson\SpeedTouch USB\Dragdiag.exe
C:\Programmi\File comuni\Symantec Shared\ccApp.exe
C:\Programmi\iTunes\iTunesHelper.exe
C:\Programmi\QuickTime\qttask.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\System32\shellexp.exe
C:\Programmi\MSN Messenger\msnmsgr.exe
C:\Programmi\iPod\bin\iPodService.exe
C:\Programmi\Kodak\KODAK Software Updater\7288971\Program\Kodak Software Updater.exe
C:\Programmi\Alice ti aiuta\bin\mpbtn.exe
C:\Programmi\MSN Apps\Updater\01.02.3000.1001\it\msnappau.exe
C:\Programmi\Messenger\msmsgs.exe
C:\Documents and Settings\PAOLO\Documenti\Documenti BIS\HijackThis ( Programma antispyre ).exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = about:blank
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://red.clientapps.yahoo.com/customize/ycomp_wave/defaults/sb/*http://www.yahoo.com/search/ie.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://red.clientapps.yahoo.com/customize/ycomp_wave/defaults/sp/*http://www.yahoo.com
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.libero.it/
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.msn.it/
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://red.clientapps.yahoo.com/customize/ycomp_wave/defaults/su/*http://www.yahoo.com
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer fornito da Alice
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_5_0.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: ST - {9394EDE7-C8B5-483E-8773-474BF36AF6E4} - C:\Programmi\MSN Apps\ST\01.02.3000.1002\en-xu\stmain.dll
O2 - BHO: MSNToolBandBHO - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\MSN Apps\MSN Toolbar\01.02.3000.1001\it\msntb.dll
O2 - BHO: Helper Class - {D80C4E21-C346-4E21-8E64-20746AA20AEB} - C:\Programmi\NavExcel Search Toolbar\NavExcelBar.dll
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Programmi\Norton AntiVirus\NavShExt.dll (file missing)
O3 - Toolbar: MSN - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\MSN Apps\MSN Toolbar\01.02.3000.1001\it\msntb.dll
O3 - Toolbar: Yahoo! Companion - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programmi\Yahoo!\Companion\Installs\cpn\ycomp5_5_5_0.dll
O3 - Toolbar: NavExcel Toolbar - {5AA06644-BC46-4220-A460-47A6EB47C96D} - C:\Programmi\NavExcel Search Toolbar\NavExcelBar.dll
O4 - HKLM\..\Run: [Matrox Powerdesk] C:\WINDOWS\System32\PDesk\PDesk.exe /Autolaunch
O4 - HKLM\..\Run: [MGA_CD_Install] E:\mgasetup.exe /No_Welcome /Lang:Italiano
O4 - HKLM\..\Run: [SpeedTouch USB Diagnostics] "C:\Programmi\Thomson\SpeedTouch USB\Dragdiag.exe" /icon
O4 - HKLM\..\Run: [ccApp] "C:\Programmi\File comuni\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [iTunesHelper] C:\Programmi\iTunes\iTunesHelper.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Explorer] C:\WINDOWS\System32\shellexp.exe en
O4 - HKCU\..\Run: [msnmsgr] "C:\Programmi\MSN Messenger\msnmsgr.exe" /background
O4 - Startup: PalNetaware.lnk = C:\Paltalk\pnetaware.exe
O4 - Global Startup: Alice ti aiuta.lnk = C:\Programmi\Alice ti aiuta\bin\matcli.exe
O4 - Global Startup: KODAK Software Updater.lnk = C:\Programmi\Kodak\KODAK Software Updater\7288971\Program\Kodak Software Updater.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
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
O16 - DPF: {99D8AF4F-307A-461C-A404-BFA33D502B31} (APStartX Control) - http://217.169.119.216/resources/APStart.ocx
O16 - DPF: {C3DFA998-A486-11D4-AA25-00C04F72DAEB} (MSN Photo Upload Tool) - http://sc.groups.msn.com/controls/PhotoUC/MsnPUpld.cab
O16 - DPF: {D719897A-B07A-4C0C-AEA9-9B663A28DFCB} (iTunesDetector Class) - http://ax.phobos.apple.com.edgesuite.net/detection/ITDetector.cab
O16 - DPF: {F58E1CEF-A068-4C15-BA5E-587CAF3EE8C6} (MSN Chat Control 4.5) - http://chat.msn.com/bin/msnchat45.cab
O16 - DPF: {FE1A240F-B247-4E06-A600-30E28F5AF3A0} - file://C:\install.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{725B0DC0-DC35-4AAA-8D25-4C0E6A56C459}: NameServer = 80.18.136.22 151.99.125.1

esegui queste operazioni

1) Disattiva il ripristino di configurazione, leggi qui come fare
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=257&SH=N

2) riavvia in modalità provvisoria, leggi qui come fare
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=344&SH=N

apri HIJAC THIS ed elimina come indicato in questo articolo
http://www.aiutamici.com/software/descrizione.asp?CodSw=1175
le righe che seguono

==================================
C:\WINDOWS\System32\shellexp.exe
-
O4 - HKCU\..\Run: [Explorer] C:\WINDOWS\System32\shellexp.exe en
-
O4 - Startup: PalNetaware.lnk = C:\Paltalk\pnetaware.exe
-
O16 - DPF: {99D8AF4F-307A-461C-A404-BFA33D502B31} (APStartX Control) - http://217.169.119.216/resources/APStart.ocx
-
O16 - DPF: {FE1A240F-B247-4E06-A600-30E28F5AF3A0} - file://C:\install.cab
==================================

con la funzione TROVA di windows cerca ed elimina i seguenti file

==================================
shellexp.exe
pnetaware.exe
APStart.ocx
==================================

al termine utilizza i programma AD-AWARE e SPYBOT indicati in questo articolo
http://www.aiutamici.com/software/view.asp?tipo=home&CodSw=388&SH=N

fai una scansione Antivirus

quindi riavvia il computer e controlla se il problema e risolto, se e tutto OK riattiva il ripristino configurazione disattivato all'inizio di questa procedura.

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Collaboratore Aiutamici

se sei curioso sul come funziona hijackthis, vai qui http://www.merijn.org/htlogtutorial.html

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Sono cosi avanti che quando guardo indietro vedo il futuro.