Da un paio di giorni ho questo problema,Norton e Company non mi segnalano niente di anormale.
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 16.39.10, on 03/08/2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP3 (6.00.2900.5512)
Boot mode: Normal

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\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\File comuni\Seagate\Schedule2\schedul2.exe
C:\Programmi\Comodo\Firewall\cmdagent.exe
C:\Programmi\Nero\Nero 7\InCD\InCDsrv.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\Java\jre6\bin\jqs.exe
C:\Programmi\Norton AntiVirus\Engine\16.5.0.134\ccSvcHst.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\IoctlSvc.exe
C:\WINDOWS\system32\HPZipm12.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\Toshiba\Bluetooth Toshiba Stack\TosBtSrv.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\Microsoft ActiveSync\Wcescomm.exe
C:\Programmi\Messenger\msmsgs.exe
C:\Programmi\File comuni\Ahead\Lib\NMBgMonitor.exe
C:\Programmi\Toshiba\Bluetooth Toshiba Stack\TosBtMng.exe
C:\PROGRA~1\MICROS~4\rapimgr.exe
C:\Programmi\NETGEAR\WG111v3\WG111v3.exe
C:\Programmi\Norton AntiVirus\Engine\16.5.0.134\ccSvcHst.exe
C:\Programmi\File comuni\Ahead\Lib\NMIndexingService.exe
C:\Programmi\File comuni\Ahead\Lib\NMIndexStoreSvr.exe
C:\Programmi\Toshiba\Bluetooth Toshiba Stack\TosA2dp.exe
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\Programmi\Toshiba\Bluetooth Toshiba Stack\TosBtHid.exe
C:\Programmi\Toshiba\Bluetooth Toshiba Stack\TosBtHsp.exe
C:\Programmi\Comodo\Firewall\cpf.exe
C:\Programmi\uTorrent\uTorrent.exe
C:\Programmi\Windows Live\Messenger\msnmsgr.exe
C:\Programmi\Windows Live\Messenger\usnsvc.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\WINDOWS\system32\dumprep.exe
C:\WINDOWS\system32\dumprep.exe
D:\Patch & varie\HijackThis 2.0.0.2\HijackThis.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 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
F2 - REG:system.ini: UserInit=C:\WINDOWS\system32\userinit.exe
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: Skype add-on (mastermind) - {22BF413B-C6D2-4d91-82A9-A0F997BA588C} - C:\Programmi\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: Symantec Intrusion Prevention - {6D53EC84-6AAE-4787-AEEE-F4628F01010C} - C:\Programmi\Norton AntiVirus\Engine\16.5.0.134\IPSBHO.DLL
O2 - BHO: Guida per l'accesso a Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.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
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [H/PC Connection Agent] "C:\Programmi\Microsoft ActiveSync\Wcescomm.exe"
O4 - HKCU\..\Run: [MSMSGS] "C:\Programmi\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Programmi\File comuni\Ahead\Lib\NMBgMonitor.exe"
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: Bluetooth Manager.lnk = ?
O4 - Global Startup: NETGEAR WG111v3 Smart Wizard.lnk = C:\Programmi\NETGEAR\WG111v3\WG111v3.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O9 - Extra button: Create Mobile Favorite - {2EAF5BB1-070F-11D3-9307-00C04FAE2D4F} - C:\PROGRA~1\MICROS~4\INetRepl.dll
O9 - Extra button: Skype - {77BF5300-1474-4EC7-9980-D32B190E9B07} - C:\Programmi\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.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
O15 - Trusted Zone: http://*.oas./support
O17 - HKLM\System\CCS\Services\Tcpip\..\{8E4A166A-6A0E-4E8C-9F5F-255843D6D0FC}: NameServer = 192.168.0.1
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FILECO~1\Skype\SKYPE4~1.DLL
O23 - Service: Acronis Scheduler2 Service (AcrSch2Svc) - Acronis - C:\Programmi\File comuni\Seagate\Schedule2\schedul2.exe
O23 - Service: Comodo Application Agent (CmdAgent) - COMODO - C:\Programmi\Comodo\Firewall\cmdagent.exe
O23 - Service: InCD Helper (InCDsrv) - Nero AG - C:\Programmi\Nero\Nero 7\InCD\InCDsrv.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Programmi\Java\jre6\bin\jqs.exe
O23 - Service: NBService - Nero AG - C:\Programmi\Nero\Nero 7\Nero BackItUp\NBService.exe
O23 - Service: Nero Registry InCD Service (NeroRegInCDSrv) - Unknown owner - C:\Programmi\Nero\Nero 7\InCD\NBHRegInCDSrv.exe (file missing)
O23 - Service: NMIndexingService - Nero AG - C:\Programmi\File comuni\Ahead\Lib\NMIndexingService.exe
O23 - Service: Norton AntiVirus - Symantec Corporation - C:\Programmi\Norton AntiVirus\Engine\16.5.0.134\ccSvcHst.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: PLFlash DeviceIoControl Service - Prolific Technology Inc. - C:\WINDOWS\system32\IoctlSvc.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: Cyberlink RichVideo Service(CRVS) (RichVideo) - Unknown owner - C:\Programmi\CyberLink\Shared files\RichVideo.exe (file missing)
O23 - Service: ServiceLayer - Nokia. - C:\Programmi\PC Connectivity Solution\ServiceLayer.exe
O23 - Service: TOSHIBA Bluetooth Service - TOSHIBA CORPORATION - C:\Programmi\Toshiba\Bluetooth Toshiba Stack\TosBtSrv.exe

--
End of file - 6884 bytes

Prova a sistemare la Trusted Zone con questo tooll:
http://www.mvps.org/winhelp2002/DelDomains.inf
Basta eseguirlo, non si deve fare altro.
Poi riavvia il pc.

Di niente amico mio.
Un giorno avrò io bisogno di te. (stò meditando di cambiare pc)
Ciao!