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Come da titolo, il mio computer va lento e spesso si spegne da solo e si riaccende sempre da solo...

Questo è il mio log di hijackthis:

Logfile of Trend Micro HijackThis v2.0.0 (BETA)
Scan saved at 11.02.42, on 13/03/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
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\Windows Defender\MsMpEng.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\ATKKBService.exe
C:\WINDOWS\System32\GEARSec.exe
C:\Programmi\File comuni\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\Programmi\Nero\Nero8\Nero BackItUp\NBService.exe
C:\Programmi\Eset\nod32krn.exe
C:\Programmi\Symantec\Norton Ghost\Agent\PQV2iSvc.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\Programmi\Analog Devices\SoundMAX\SMAgent.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\File comuni\Ulead Systems\DVD\ULCDRSvr.exe
C:\WINDOWS\system32\ZoneLabs\vsmon.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\Analog Devices\SoundMAX\SMax4PNP.exe
C:\Programmi\Analog Devices\SoundMAX\smax4.exe
C:\Programmi\VIA\RAID\raid_tool.exe
C:\Programmi\Eset\nod32kui.exe
C:\Programmi\SlySoft\AnyDVD\AnyDVD.exe
C:\Programmi\Symantec\Norton Ghost\Agent\GhostTray.exe
C:\Programmi\Zone Labs\ZoneAlarm\zlclient.exe
C:\Programmi\File comuni\Scansoft Shared\SSBkgdUpdate\SSBkgdupdate.exe
C:\PROGRA~1\ALICET~1\SMARTB~1\MotiveSB.exe
C:\Programmi\Alice ti aiuta\vendors\AliceRE\content\template\driven_dev\syncer\McciTrayApp.exe
C:\WINDOWS\system32\rundll32.exe
C:\Programmi\Windows Defender\MSASCui.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Programmi\File comuni\InstallShield\UpdateService\agent.exe
C:\Programmi\Java\jre1.6.0_05\bin\jusched.exe
C:\Programmi\Lavasoft\Ad-Aware SE Professional\Ad-Watch.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\Alice ti aiuta\bin\mpbtn.exe
C:\Programmi\eMule\emule.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\hi\HiJackThis_v2.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.alice.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
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programmi\Java\jre1.6.0_05\bin\ssv.dll
O2 - BHO: Encarta Web Companion Oggetto helper - {955BE0B8-BC85-4CAF-856E-8E0D8B610560} - C:\Programmi\File comuni\Microsoft Shared\Encarta Web Companion\ENCWCBAR.DLL
O2 - BHO: EpsonToolBandKicker Class - {E99421FB-68DD-40F0-B4AC-B7027CAE2F1A} - C:\Programmi\EPSON\EPSON Web-To-Page\EPSON Web-To-Page.dll
O3 - Toolbar: Encarta Web Companion - {147D6308-0614-4112-89B1-31402F9B82C4} - C:\Programmi\File comuni\Microsoft Shared\Encarta Web Companion\ENCWCBAR.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: [SoundMAXPnP] C:\Programmi\Analog Devices\SoundMAX\SMax4PNP.exe
O4 - HKLM\..\Run: [SoundMAX] "C:\Programmi\Analog Devices\SoundMAX\smax4.exe" /tray
O4 - HKLM\..\Run: [RaidTool] C:\Programmi\VIA\RAID\raid_tool.exe
O4 - HKLM\..\Run: [nod32kui] "C:\Programmi\Eset\nod32kui.exe" /WAITSERVICE
O4 - HKLM\..\Run: [AnyDVD] C:\Programmi\SlySoft\AnyDVD\AnyDVD.exe
O4 - HKLM\..\Run: [Norton Ghost 9.0] C:\Programmi\Symantec\Norton Ghost\Agent\GhostTray.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [ZoneAlarm Client] "C:\Programmi\Zone Labs\ZoneAlarm\zlclient.exe"
O4 - HKLM\..\Run: [SSBkgdUpdate] C:\Programmi\File comuni\Scansoft Shared\SSBkgdUpdate\SSBkgdupdate.exe -Embedding -boot
O4 - HKLM\..\Run: [Motive SmartBridge] C:\PROGRA~1\ALICET~1\SMARTB~1\MotiveSB.exe
O4 - HKLM\..\Run: [ATIPTA] "C:\Programmi\ATI Technologies\ATI Control Panel\atiptaxx.exe"
O4 - HKLM\..\Run: [VIRIT LITE MONITOR] C:\VEXPLITE\MONLITE.EXE
O4 - HKLM\..\Run: [AliceRE_McciTrayApp] C:\Programmi\Alice ti aiuta\vendors\AliceRE\content\template\driven_dev\syncer\McciTrayApp.exe
O4 - HKLM\..\Run: [CnxTrApp] rundll32.exe "C:\Programmi\Pirelli\Access Gateway USB Network\CnxTrApp.dll",AppEntry -REG "Pirelli\Access Gateway USB"
O4 - HKLM\..\Run: [Windows Defender] "C:\Programmi\Windows Defender\MSASCui.exe" -hide
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Programmi\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [NeroFilterCheck] C:\Programmi\File comuni\Nero\Lib\NeroCheck.exe
O4 - HKLM\..\Run: [NBKeyScan] "C:\Programmi\Nero\Nero8\Nero BackItUp\NBKeyScan.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programmi\Java\jre1.6.0_05\bin\jusched.exe"
O4 - HKCU\..\Run: [AWMON] "C:\Programmi\Lavasoft\Ad-Aware SE Professional\Ad-Watch.exe"
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Nero PhotoShow Media Manager] C:\PROGRA~1\Nero\PHOTOS~1\data\Xtras\mssysmgr.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: Alice ti aiuta.lnk = C:\Programmi\Alice ti aiuta\bin\matcli.exe
O8 - Extra context menu item: Add to AMV Convert Tool... - C:\Programmi\MP3 Player Utilities 4.00\AMVConverter\grab.html
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O8 - Extra context menu item: MediaManager tool grab multimedia file - C:\Programmi\MP3 Player Utilities 4.00\MediaManager\grab.html
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.6.0_05\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.6.0_05\bin\ssv.dll
O16 - DPF: {0EB0E74A-2A76-4AB3-A7FB-9BD8C29F7F75} (CKAVWebScan Object) - http://www.kaspersky.com/kos/eng/partner/default/kavwebscan_unicode.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://www.update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1192292165328
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{B6BBFD87-5DC8-4C73-9FE0-76F05115AE0F}: NameServer = 85.37.17.58 85.38.28.94
O18 - Filter: application/xhtml+xml; charset=iso-8859-1 - {32F66A26-7614-11D4-BD11-00104BD3F987} - C:\Programmi\Design Science\MathPlayer\MathMLMimer.dll
O18 - Filter: application/xhtml+xml; charset=utf-8 - {32F66A26-7614-11D4-BD11-00104BD3F987} - C:\Programmi\Design Science\MathPlayer\MathMLMimer.dll
O18 - Filter: text/xml; charset=iso-8859-1 - {32F66A26-7614-11D4-BD11-00104BD3F987} - C:\Programmi\Design Science\MathPlayer\MathMLMimer.dll
O18 - Filter: text/xml; charset=utf-8 - {32F66A26-7614-11D4-BD11-00104BD3F987} - C:\Programmi\Design Science\MathPlayer\MathMLMimer.dll
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: ATK Keyboard Service (ATKKeyboardService) - ASUSTeK COMPUTER INC. - C:\WINDOWS\ATKKBService.exe
O23 - Service: GEARSecurity - GEAR Software - C:\WINDOWS\System32\GEARSec.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Programmi\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: Nero BackItUp Scheduler 3 - Nero AG - C:\Programmi\Nero\Nero8\Nero BackItUp\NBService.exe
O23 - Service: NMIndexingService - Nero AG - C:\Programmi\File comuni\Nero\Lib\NMIndexingService.exe
O23 - Service: NOD32 Kernel Service (NOD32krn) - Eset - C:\Programmi\Eset\nod32krn.exe
O23 - Service: Norton Ghost - Symantec Corporation - C:\Programmi\Symantec\Norton Ghost\Agent\PQV2iSvc.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: SoundMAX Agent Service (SoundMAX Agent Service (default)) - Analog Devices, Inc. - C:\Programmi\Analog Devices\SoundMAX\SMAgent.exe
O23 - Service: Ulead Burning Helper (UleadBurningHelper) - Ulead Systems, Inc. - C:\Programmi\File comuni\Ulead Systems\DVD\ULCDRSvr.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs, LLC - C:\WINDOWS\system32\ZoneLabs\vsmon.exe

--
End of file - 8823 bytes


Grazie a chi mi aiuterà

[bdoriano]

Il log di hijackthis sembra pulito.
Anche per te, facciamo le operazioni standard:

1. Disabilita il ripristino di sistema.
   
2. Scarica ATF-Cleaner.
   Avvia ATF-Cleaner (serve a eliminare i files temporanei)
   Metti il segno di spunta a Select All (come indicato in figura)
   (se vuoi conservare i files del cestino, togli il segno di spunta a Recycle bin)
   
   Clicca su
   
   Se attiva, clicca sulla voce FireFox
   Metti il segno di spunta a Firefox caches e Firefox cookies (come indicato in figura)
   
   Clicca su
   
   Se attiva, clicca sulla voce Opera
   Metti il segno di spunta a Opera caches e Opera cookies (come indicato in figura)
   
   Clicca su
   
3. Scarica Norman Malware Cleaner e drWeb CureIt.
   
4. Avvia il pc in modalità provvisoria.
   
5. Avvia drWeb CureIt e fagli fare la scansione completa.
   
6. Avvia Norman Malware Cleaner e fagli fare la scansione completa.
   Viene generato un log sul desktop chiamandolo NFix_2008-03-gg_hh-mm-ss.log, alla fine della scansione caricalo su FreeFileHosting come indicato qui e posta il link che ti viene assegnato.
   
7. Segui le istruzioni di questo topic per postare il log di combofix.