il mio pc si spegne e riaccende in continuazione

[Melisenda]

Da qualche giorno si spegne e riaccende continuamente, adesso sono in modalità provvisoria, non so proprio cosa fare, temo sia stata una modifica al registro fatta da teatimer, non ne sono sicura però.
C'è qualcuno che sa darmi qualche suggerimento?
Per intanto posto hijack (chissà che possa esservi utile)

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 17.09.37, on 30/04/2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16827)
Boot mode: Normal

Running processes:
I:\WINDOWS\System32\smss.exe
I:\WINDOWS\system32\csrss.exe
I:\WINDOWS\system32\winlogon.exe
I:\WINDOWS\system32\services.exe
I:\WINDOWS\system32\lsass.exe
I:\WINDOWS\System32\Ati2evxx.exe
I:\WINDOWS\system32\svchost.exe
I:\WINDOWS\system32\svchost.exe
I:\WINDOWS\System32\svchost.exe
I:\WINDOWS\System32\svchost.exe
I:\WINDOWS\System32\svchost.exe
I:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
I:\Programmi\Alwil Software\Avast4\ashServ.exe
I:\WINDOWS\system32\Ati2evxx.exe
I:\WINDOWS\Explorer.EXE
I:\WINDOWS\system32\spoolsv.exe
I:\WINDOWS\System32\svchost.exe
I:\Programmi\Kaspersky Lab\Kaspersky Anti-Virus 7.0\avp.exe
I:\Programmi\ICQ6Toolbar\ICQ Service.exe
I:\Programmi\Spyware Doctor\pctsAuxs.exe
I:\Programmi\Spyware Doctor\pctsSvc.exe
I:\WINDOWS\System32\svchost.exe
I:\Programmi\Spyware Doctor\pctsTray.exe
I:\Programmi\Alwil Software\Avast4\ashMaiSv.exe
I:\Programmi\Alwil Software\Avast4\ashWebSv.exe
I:\WINDOWS\System32\alg.exe
I:\Programmi\Spyware Doctor\TFEngine\TFService.exe
I:\Programmi\Internet Explorer\iexplore.exe
I:\WINDOWS\system32\ctfmon.exe
I:\Programmi\Trend Micro\HijackThis\HijackThis.exe
I:\WINDOWS\system32\wbem\wmiprvse.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://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 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - I:\Programmi\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - I:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - I:\Programmi\Google\Google Toolbar\GoogleToolbar.dll
O3 - Toolbar: ICQToolBar - {855F3B16-6D32-4fe6-8A56-BBB695989046} - I:\Programmi\ICQ6Toolbar\ICQToolBar.dll
O3 - Toolbar: &Google Toolbar - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - I:\Programmi\Google\Google Toolbar\GoogleToolbar.dll
O4 - HKLM\..\Run: [AVP] "I:\Programmi\Kaspersky Lab\Kaspersky Anti-Virus 7.0\avp.exe"
O4 - HKLM\..\Run: [AGRSMMSG] AGRSMMSG.exe
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [AlcWzrd] ALCWZRD.EXE
O4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXE
O4 - HKLM\..\Run: [ISTray] "I:\Programmi\Spyware Doctor\pctsTray.exe"
O4 - HKLM\..\Run: [zzzHPSETUP] J:\Setup.exe
O4 - HKLM\..\Run: [avast!] I:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKCU\..\Run: [CTFMON.EXE] I:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "I:\Programmi\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [Emule Installer] "I:\Programmi\Emule Installer\EmuleInstaller.exe" hmw
O4 - HKCU\..\Run: [SUPERAntiSpyware] I:\Programmi\SUPERAntiSpyware\SUPERAntiSpyware.exe
O4 - HKCU\..\Run: [swg] I:\Programmi\Google\GoogleToolbarNotifier\1.2.1128.5462\GoogleToolbarNotifier.exe
O4 - HKCU\..\Run: [yuwwywc] i:\documents and settings\proprietario\impostazioni locali\dati applicazioni\yuwwywc.exe yuwwywc
O4 - HKCU\..\Run: [SpybotSD TeaTimer] I:\Programmi\Spybot - Search & Destroy\TeaTimer.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] I:\WINDOWS\System32\CTFMON.EXE (User 'SERVIZIO LOCALE')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] I:\WINDOWS\System32\CTFMON.EXE (User 'SERVIZIO DI RETE')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] I:\WINDOWS\System32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] I:\WINDOWS\System32\CTFMON.EXE (User 'Default user')
O4 - Startup: Adobe Gamma.lnk = I:\Programmi\File comuni\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Kodak EasyShare software.lnk = I:\Programmi\Kodak\Kodak EasyShare software\bin\EasyShare.exe
O9 - Extra button: Web Anti-Virus - {1F460357-8A94-4D71-9CA3-AA4ACF32ED8E} - I:\Programmi\Kaspersky Lab\Kaspersky Anti-Virus 7.0\SCIEPlgn.dll
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - I:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - I:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - I:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - I:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra button: ICQ6 - {E59EB121-F339-4851-A3BA-FE49C35617C2} - I:\Programmi\ICQ6\ICQ.exe
O9 - Extra 'Tools' menuitem: ICQ6 - {E59EB121-F339-4851-A3BA-FE49C35617C2} - I:\Programmi\ICQ6\ICQ.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - I:\Programmi\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - I:\Programmi\Messenger\msmsgs.exe
O12 - Plugin for .pdf: I:\Programmi\Internet Explorer\PLUGINS\nppdf32.dll
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {4C39376E-FA9D-4349-BACC-D305C1750EF3} (EPUImageControl Class) - http://tools.ebayimg.com/eps/wl/activex ... 0-24-0.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://www.update.microsoft.com/windows ... 8877290265
O16 - DPF: {6B75345B-AA36-438A-BBE6-4078B4C6984D} (HpProductDetection Class) - http://h20270.www2.hp.com/ediags/gmn2/i ... ection.cab
O16 - DPF: {6F15128C-E66A-490C-B848-5000B5ABEEAC} (HP Download Manager) - https://h20436.www2.hp.com/ediags/dex/s ... DEXAXO.cab
O16 - DPF: {C45B1500-7B63-47C2-AB25-C28CB46AFDEE} (MediaBar) - http://sib1.pvw.od2.com/common/musicman ... Plugin.CAB
O16 - DPF: {E8F628B5-259A-4734-97EE-BA914D7BE941} (Driver Agent ActiveX Control) - http://plugin.driveragent.com/files/driveragent.cab
O20 - Winlogon Notify: !SASWinLogon - I:\Programmi\SUPERAntiSpyware\SASWINLO.DLL
O23 - Service: Adobe LM Service - Adobe Systems - I:\Programmi\File comuni\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - I:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - I:\WINDOWS\System32\Ati2evxx.exe
O23 - Service: avast! Antivirus - ALWIL Software - I:\Programmi\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - I:\Programmi\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - I:\Programmi\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: Kaspersky Anti-Virus 7.0 (AVP) - Kaspersky Lab - I:\Programmi\Kaspersky Lab\Kaspersky Anti-Virus 7.0\avp.exe
O23 - Service: Google Updater Service (gusvc) - Google - I:\Programmi\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: ICQ Service - Unknown owner - I:\Programmi\ICQ6Toolbar\ICQ Service.exe
O23 - Service: PC Tools Auxiliary Service (sdAuxService) - PC Tools - I:\Programmi\Spyware Doctor\pctsAuxs.exe
O23 - Service: PC Tools Security Service (sdCoreService) - PC Tools - I:\Programmi\Spyware Doctor\pctsSvc.exe
O23 - Service: ThreatFire - PC Tools - I:\Programmi\Spyware Doctor\TFEngine\TFService.exe

--
End of file - 7998 bytes

[jordan air]

O4 - HKLM\..\Run: [zzzHPSETUP] J:\Setup.exe
O4 - HKCU\..\Run: [yuwwywc] i:\documents and settings\proprietario\impostazioni locali\dati applicazioni\yuwwywc.exe yuwwywc
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - I:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - I:\WINDOWS\Network Diagnostic\xpnetdiag.exe

Elimina queste voci.

Il problema esposto, sembra più di derivazione hardware. Controlla per scrupolo le temperature della scheda madre e del processore. Inoltro, e ne hai la possibilità, sostituisci l'alimentatore, con un modello sicuramente funzionante.