il pc mi si spegne da solo senza dare messaggi.
non trovato virus o malware
grazie
mario



Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 17.04.18, on 25/08/2011
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v8.00 (8.00.6001.18702)
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:\Programmi\Microsoft Security Client\Antimalware\MsMpEng.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\Samsung\PanelMgr\SSMMgr.exe
C:\PROGRA~1\ALICET~1\SMARTB~1\MotiveSB.exe
C:\Programmi\Seagate\DiscWizard\DiscWizardMonitor.exe
C:\Programmi\Seagate\DiscWizard\TimounterMonitor.exe
C:\Programmi\File comuni\Seagate\Schedule2\schedhlp.exe
C:\Programmi\Java\jre6\bin\jqs.exe
C:\Programmi\Microsoft LifeCam\MSCamS32.exe
C:\Programmi\File comuni\Java\Java Update\jusched.exe
C:\Programmi\Microsoft Security Client\msseces.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\CDBurnerXP\NMSAccessU.exe
C:\Programmi\Norton Safe Web Lite\Engine\1.2.0.6\ccSvcHst.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\Programmi\File comuni\Seagate\Schedule2\schedul2.exe
C:\WINDOWS\System32\svchost.exe
C:\Documents and Settings\MARCO\Documenti\PORTABLE\PNotesPortable\App\PNotes\PNotes.exe
D:\HjackThis\HijackThis.exe

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
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = 127.0.0.1
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
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
O2 - BHO: Norton Safe Web Lite BHO - {F0DA78E9-6B60-42fb-BC26-EF2CFB8C8FF3} - C:\Programmi\Norton Safe Web Lite\Engine\1.2.0.6\coIEPlg.dll
O3 - Toolbar: Norton Safe Web Lite - {30CEEEA2-3742-40e4-85DD-812BF1CBB83D} - C:\Programmi\Norton Safe Web Lite\Engine\1.2.0.6\coIEPlg.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [Samsung PanelMgr] C:\WINDOWS\Samsung\PanelMgr\SSMMgr.exe /autorun
O4 - HKLM\..\Run: [Motive SmartBridge] C:\PROGRA~1\ALICET~1\SMARTB~1\MotiveSB.exe
O4 - HKLM\..\Run: [DiscWizardMonitor.exe] C:\Programmi\Seagate\DiscWizard\DiscWizardMonitor.exe
O4 - HKLM\..\Run: [AcronisTimounterMonitor] C:\Programmi\Seagate\DiscWizard\TimounterMonitor.exe
O4 - HKLM\..\Run: [Seagate Scheduler2 Service] "C:\Programmi\File comuni\Seagate\Schedule2\schedhlp.exe"
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [LifeCam] "C:\Programmi\Microsoft LifeCam\LifeExp.exe"
O4 - HKLM\..\Run: [OutpostMonitor] C:\PROGRA~1\Agnitum\OUTPOS~1\op_mon.exe /tray /noservice
O4 - HKLM\..\Run: [OutpostFeedBack] "C:\Programmi\Agnitum\Outpost Firewall\feedback.exe" /dump:os_startup
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programmi\File comuni\Java\Java Update\jusched.exe"
O4 - HKLM\..\Run: [MSC] "C:\Programmi\Microsoft Security Client\msseces.exe" -hide -runkey
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [ccleaner] "C:\Documents and Settings\MARCO\Documenti\PORTABLE\CCleaner\CCleaner.exe" /AUTO
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 - Startup: Collegamento a PNotesPortable.exe.lnk = C:\Documents and Settings\MARCO\Documenti\PORTABLE\PNotesPortable\PNotesPortable.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~3\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~3\OFFICE11\REFIEBAR.DLL
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
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://asia.msi.com.tw
O15 - Trusted Zone: http://global.msi.com.tw
O16 - DPF: {8167C273-DF59-4416-B647-C8BB2C7EE83E} (WebSDev Control) - http://liveupdate.msi.com.tw/autobios/LOnline/install.cab
O16 - DPF: {E2883E8F-472F-4FB0-9522-AC9BF37916A7} - http://platformdl.adobe.com/NOS/getPlusPlus/1.6/gp.cab
O20 - AppInit_DLLs: c:\progra~1\agnitum\outpos~1\wl_hook.dll
O23 - Service: Agnitum Client Security Service (acssrv) - Agnitum Ltd. - C:\PROGRA~1\Agnitum\OUTPOS~1\acs.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Programmi\Java\jre6\bin\jqs.exe
O23 - Service: NMSAccess - Unknown owner - C:\Programmi\CDBurnerXP\NMSAccessU.exe
O23 - Service: Norton Safe Web Lite (NSL) - Symantec Corporation - C:\Programmi\Norton Safe Web Lite\Engine\1.2.0.6\ccSvcHst.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: ServiceLayer - Nokia - C:\Programmi\PC Connectivity Solution\ServiceLayer.exe
O23 - Service: Seagate Scheduler2 Service (SgtSch2Svc) - Seagate - C:\Programmi\File comuni\Seagate\Schedule2\schedul2.exe

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End of file - 6488 bytes

Il log non presenta anomalie.
Escluderei problemi di virus se il tuo antivirus non rileva nulla e propenderei per altre cause (alimentatore, dissipatore ecc...).
E' un portatile o un desktop?

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Si chiama registro degli eventi.
Pannello di controllo >> Strumenti Amministrazione >> Visualizzatore eventi >> Sistema.

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prova a fare uno scandisk :O)

e poi dagli una bella pulita all'interno :O)

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