Credo che ci vorrebbe un tecnico per fare il controllo che mi hai indicato, io non mi sento in grado di farlo, anche perchè oltretutto ho un PC all in one e credo sia ancora più complicato aprirlo per controllare la RAM.
Per il momento se non dovesse più spegnersi mentre navigo e mi restasse soltanto il problema della mancata accensione quando riavvio il PC non farò nulla.
Sicuramente il tuo aiuto mi ha permesso d fare un'ottima pulizia ed il PC ora è più veloce.
Ho ancora una domanda da farti, ho eliminato la cartella Poweroffer, ma facendo nuovamente un log HijackThis ho visto che non è sparito del tutto, come puoi vedere (l'ho evidenziato in grassetto):
Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 17:00:12, on 12/12/2011
Platform: Windows 7 SP1 (WinNT 6.00.3505)
MSIE: Internet Explorer v9.00 (9.00.8112.16421)
Boot mode: Normal
Running processes:
C:\windows\system32\Dwm.exe
C:\windows\Explorer.EXE
C:\windows\system32\taskhost.exe
C:\Program Files\EASEUS\Todo Backup\bin\EuWatch.exe
C:\Program Files\EASEUS\Todo Backup\bin\TrayNotify.exe
C:\Program Files\IObit\Advanced SystemCare 5\ASCTray.exe
C:\Windows\System32\StikyNot.exe
C:\Program Files\Alwil Software\Avast5\AvastUI.exe
C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Mozilla Firefox\plugin-container.exe
C:\PROGRAM FILES\STARDOCK\OBJECTDOCK\OBJECTDOCK.EXE
C:\Program Files\Common Files\Microsoft Shared\Ink\InputPersonalization.exe
C:\Windows\System32\taskmgr.exe
C:\Program Files\Windows Live\Mail\wlmail.exe
C:\Program Files\Windows Live\Contacts\wlcomm.exe
C:\windows\explorer.exe
C:\Users\utente\Desktop\SICUREZZA e PULIZIA\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=69157R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL =
http://go.microsoft.com/fwlink/?LinkId=54896R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page =
http://go.microsoft.com/fwlink/?LinkId=54896R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page =
http://go.microsoft.com/fwlink/?LinkId=69157R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: RealPlayer Download and Record Plugin for Internet Explorer - {3049C3E9-B461-4BC5-8870-4C09146192CA} - C:\ProgramData\Real\RealPlayer\BrowserRecordPlugin\IE\rpbrowserrecordplugin.dll
O2 - BHO: PowerOffer - {3543619C-D563-43f7-95EA-4DA7E1CC396A} - (no file)O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: Search Helper - {6EBF7485-159F-4bff-A14F-B9E3AAC4465B} - C:\Program Files\Microsoft\Search Enhancement Pack\Search Helper\SEPsearchhelperie.dll
O2 - BHO: avast! WebRep - {8E5E2654-AD2D-48bf-AC2D-D17F00898D06} - C:\Program Files\Alwil Software\Avast5\aswWebRepIE.dll
O2 - BHO: Windows Live ID Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: SkypeIEPluginBHO - {AE805869-2E5C-4ED4-8F7B-F1F7851A4497} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O3 - Toolbar: avast! WebRep - {8E5E2654-AD2D-48bf-AC2D-D17F00898D06} - C:\Program Files\Alwil Software\Avast5\aswWebRepIE.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\windows\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [EaseUs Watch] "C:\Program Files\EaseUS\Todo Backup\bin\EuWatch.exe"
O4 - HKLM\..\Run: [EaseUs Tray] "C:\Program Files\EaseUS\Todo Backup\bin\TrayNotify.exe"
O4 - HKCU\..\Run: [Advanced SystemCare 5] "C:\Program Files\IObit\Advanced SystemCare 5\ASCTray.exe" /AutoStart
O4 - HKCU\..\Run: [RESTART_STICKY_NOTES] C:\Windows\System32\StikyNot.exe
O4 - HKCU\..\Run: [avast! Antivirus] "C:\Program Files\Alwil Software\Avast5\AvastUI.exe"
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
O4 - Startup: Mozilla Firefox.lnk = C:\Program Files\Mozilla Firefox\firefox.exe
O6 - HKLM\Software\Policies\Microsoft\Internet Explorer\Restrictions present
O6 - HKLM\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: Add to Google Photos Screensa&ver - res://C:\windows\system32\GPhotos.scr/200
O9 - Extra button: Skype Plug-In - {898EA8C8-E7FF-479B-8935-AEC46303B9E5} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O9 - Extra 'Tools' menuitem: Skype Plug-In - {898EA8C8-E7FF-479B-8935-AEC46303B9E5} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O10 - Unknown file in Winsock LSP: c:\program files\common files\microsoft shared\windows live\wlidnsp.dll
O10 - Unknown file in Winsock LSP: c:\program files\common files\microsoft shared\windows live\wlidnsp.dll
O11 - Options group: [ACCELERATED_GRAPHICS] Accelerated graphics
O15 - Trusted Zone:
http://www.samsungsetup.comO18 - Protocol: skype-ie-addon-data - {91774881-D725-4E58-B298-07617B9B86A8} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O23 - Service: ArcSoft Connect Daemon (ACDaemon) - ArcSoft Inc. - C:\Program Files\Common Files\ArcSoft\Connection Service\Bin\ACService.exe
O23 - Service: Adobe Acrobat Update Service (AdobeARMservice) - Adobe Systems Incorporated - C:\Program Files\Common Files\Adobe\ARM\1.0\armsvc.exe
O23 - Service: Advanced SystemCare Service 5 (AdvancedSystemCareService5) - IObit - C:\Program Files\IObit\Advanced SystemCare 5\ASCService.exe
O23 - Service: avast! Antivirus - AVAST Software - C:\Program Files\Alwil Software\Avast5\AvastSvc.exe
O23 - Service: avast! Firewall - AVAST Software - C:\Program Files\Alwil Software\Avast5\afwServ.exe
O23 - Service: EaseUS Agent - CHENGDU YIWO Tech Development Co., Ltd - C:\Program Files\EaseUS\Todo Backup\bin\Agent.exe
O23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - C:\Program Files\Common Files\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: Guard Agent - CHENGDU YIWO Tech Development Co., Ltd - C:\Program Files\EaseUS\Todo Backup\bin\GuardAgent.exe
O23 - Service: Servizio di Google Update (gupdate) (gupdate) - Google Inc. - C:\Program Files\Google\Update\GoogleUpdate.exe
O23 - Service: Servizio Google Update (gupdatem) (gupdatem) - Google Inc. - C:\Program Files\Google\Update\GoogleUpdate.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: IMF Service (IMFservice) - IObit - C:\Program Files\IObit\IObit Malware Fighter\IMFsrv.exe
O23 - Service: @C:\Program Files\Nero\Update\NASvc.exe,-200 (NAUpdate) - Nero AG - C:\Program Files\Nero\Update\NASvc.exe
O23 - Service: NitroPDFReaderDriverCreatorReadSpool (NitroReaderDriverReadSpool) - Nitro PDF Software - C:\Program Files\Nitro PDF\Reader\NitroPDFReaderDriverService.exe
O23 - Service: NVIDIA Display Driver Service (nvsvc) - NVIDIA Corporation - C:\windows\system32\nvvsvc.exe
O23 - Service: ServiceLayer - Nokia - C:\Program Files\PC Connectivity Solution\ServiceLayer.exe
O23 - Service: WMI_Hook_Service - MICRO-STAR INT'L,.LTD. - C:\Program Files\msi\WMIHookBtnFn\WMI_Hook_Service.exe
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End of file - 7382 bytes