questo il file log del programma che mi hai consigliato

Logfile of HijackThis v1.98.2
Scan saved at 21.55.54, on 29/01/2005
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:\Programmi\Norton AntiVirus\navapsvc.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\PROGRA~1\NORTON~1\navapw32.exe
C:\WINDOWS\soundman.exe
C:\Programmi\Hewlett-Packard\HP Share-to-Web\hpgs2wnd.exe
C:\WINDOWS\System32\qttask.exe
C:\Programmi\Microsoft Hardware\Keyboard\type32.exe
C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_S4I0T 1.EXE
C:\Programmi\MSN Messenger\msnmsgr.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\Programmi\Hewlett-Packard\HP Share-to-Web\hpgs2wnf.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Programmi\Internet Explorer\iexplore.exe
C:\DOCUME~1\PROPRI~1\IMPOST~1\Temp\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://it.yahoo.com/
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
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: CNavExtBho Class - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Programmi\Norton AntiVirus\NavShExt.dll
O2 - BHO: EpsonToolBandKicker Class - {E99421FB-68DD-40F0-B4AC-B7027CAE2F1A} - C:\Programmi\EPSON\EPSON Web-To-Page\EPSON Web-To-Page.dll
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Programmi\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: EPSON Web-To-Page - {EE5D279F-081B-4404-994D-C6B60AAEBA6D} - C:\Programmi\EPSON\EPSON Web-To-Page\EPSON Web-To-Page.dll
O4 - HKLM\..\Run: [NAV Agent] C:\PROGRA~1\NORTON~1\navapw32.exe
O4 - HKLM\..\Run: [SoundMan] soundman.exe
O4 - HKLM\..\Run: [Share-to-Web Namespace Daemon] C:\Programmi\Hewlett-Packard\HP Share-to-Web\hpgs2wnd.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [QuickTime Task] C:\WINDOWS\System32\qttask.exe
O4 - HKLM\..\Run: [IntelliType] "C:\Programmi\Microsoft Hardware\Keyboard\type32.exe"
O4 - HKLM\..\Run: [Symantec NetDriver Monitor] C:\PROGRA~1\SYMNET~1\SNDMon.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [EPSON Stylus C46 Series] C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_S4I0T 1.EXE /P23 "EPSON Stylus C46 Series" /O6 "USB001" /M "Stylus C46"
O4 - HKCU\..\Run: [msnmsgr] "C:\Programmi\MSN Messenger\msnmsgr.exe" /background
O4 - HKCU\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\System32\NVMCTRAY.DLL,NvTaskbarInit
O4 - Global Startup: Microsoft Office.lnk = C:\Programmi\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: &Download Flash Files - C:\PROGRA~1\Leesoft\FLASHH~1\save.htm
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
O9 - Extra button: Flash Hunter - {6163F81A-7F01-45E1-996C-EDCA4388941E} - C:\PROGRA~1\Leesoft\FLASHH~1\save.htm (HKCU)
O9 - Extra 'Tools' menuitem: &Flash Hunter - {6163F81A-7F01-45E1-996C-EDCA4388941E} - C:\PROGRA~1\Leesoft\FLASHH~1\save.htm (HKCU)
O16 - DPF: {00B71CFB-6864-4346-A978-C0A14556272C} (Checkers Class) - http://messenger.zone.msn.com/binary/msgrchkr.cab
O16 - DPF: {1EDF25DE-DFB2-40CA-AA83-30AE7DA8C203} (FileSharingCtrl Class) - http://appdirectory.messenger.msn.co...haringctrl.cab
O16 - DPF: {30528230-99F7-4BB4-88D8-FA1D4F56A2AB} (YInstStarter Class) - http://us.dl1.yimg.com/download.yaho.../yinst0401.cab
O16 - DPF: {87BF5318-D5F0-41F4-9D14-47967FA8C12B} - http://www.ipix.com/viewers/ipixx.cab
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary...tatsClient.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{139CD21C-E040-4A56-AC55-307E82656025}: NameServer = 212.216.172.62 212.216.112.112
O17 - HKLM\System\CCS\Services\Tcpip\..\{59575217-256F-4F2D-A4A0-B75C6BEBD279}: NameServer = 212.216.172.6