mi è sparito da start il pulsante spegni pc cè solo quello disconetti questo è il mio log Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 23.35.31, on 28/05/2008
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16640)
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:\APPS\Powercinema\Kernel\TV\CLCapSvc.exe
C:\Programmi\COMODO\Firewall\cmdagent.exe
C:\Programmi\ESET\ESET NOD32 Antivirus\ekrn.exe
c:\APPS\HIDSERVICE\HIDSERVICE.exe
C:\WINDOWS\system32\HDDSvc.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\slserv.exe
C:\WINDOWS\system32\svchost.exe
c:\APPS\Powercinema\Kernel\TV\CLSched.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\digicomt\Michelangelo USB ADSL\CnxDslTb.exe
C:\Programmi\ESET\ESET NOD32 Antivirus\egui.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\COMODO\Firewall\cfp.exe
C:\Programmi\PeerGuardian2\pg2.exe
C:\Programmi\Winamp\winamp.exe
E:\eMule\emule.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\Programmi\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.crawler.com/search/dispatcher.aspx?tp=aus&qkw=%s&tbid=60337
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
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,SearchAssistant = http://www.crawler.com/search/ie.aspx?tb_id=60337
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,CustomizeSearch = http://dnl.crawler.com/support/sa_customize.aspx?TbId=60337
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\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page = C:\WINDOWS\pchealth\helpctr\System\panels\blank.htm
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
O2 - BHO: &Yahoo! Toolbar Helper - {02478D38-C3F9-4efb-9B51-7695ECA05670} - (no file)
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: (no name) - {089FD14D-132B-48FC-8861-0048AE113215} - C:\Programmi\SiteAdvisor\6253\SiteAdv.dll
O2 - BHO: AddTask Class - {24F06550-65E3-4D1C-8CFE-839C296B5530} - (no file)
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programmi\Java\jre1.6.0_05\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O3 - Toolbar: McAfee SiteAdvisor - {0BF43445-2F28-4351-9252-17FE6E806AA0} - C:\Programmi\SiteAdvisor\6253\SiteAdv.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
O4 - HKLM\..\Run: [NvCplDaemon] -RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [NvMediaCenter] -RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [SunJavaUpdateSched] -"C:\Programmi\Java\jre1.6.0_05\bin\jusched.exe"
O4 - HKLM\..\Run: [SiteAdvisor] -C:\Programmi\SiteAdvisor\6253\SiteAdv.exe
O4 - HKLM\..\Run: [CnxDslTaskBar] "C:\Programmi\digicomt\Michelangelo USB ADSL\CnxDslTb.exe"
O4 - HKLM\..\Run: [cFosSpeed] -C:\Programmi\cFosSpeed\cFosSpeed.exe
O4 - HKLM\..\Run: [rfagent] -"C:\Programmi\RFA Platinum\rfagent.exe"
O4 - HKLM\..\Run: [NeroFilterCheck] -C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [ProcessGovernor] -C:\Programmi\Process Lasso\processgovernor.exe
O4 - HKLM\..\Run: [COMODO Firewall Pro] -"C:\Programmi\COMODO\Firewall\cfp.exe" -h
O4 - HKLM\..\Run: [LXCGCATS] -rundll32 C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\LXCGtime.dll,_RunDLLEntry@16
O4 - HKLM\..\Run: [egui] "C:\Programmi\ESET\ESET NOD32 Antivirus\egui.exe" /hide /waitservice
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [PeerGuardian] -C:\Programmi\PeerGuardian2\pg2.exe
O4 - HKCU\..\Run: [DeskSlide] -C:\Programmi\DeskSlide\DeskSlide.exe -logon -hide
O4 - HKCU\..\Run: [ProcessSupervisorGUI] -C:\Programmi\Process Lasso\ProcessLasso.exe /tray
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')
O8 - Extra context menu item: Scarica con Download &Express - C:\Programmi\Download Express\Add_Url.htm
O8 - Extra context menu item: Scaricare usando &BitSpirit
- C:\Programmi\BitSpirit\bsurl.htm
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
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
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
O14 - IERESET.INF: START_PAGE_URL=file://C:\APPS\IE\offline\it.htm
O15 - Trusted Zone: *.cercoporno.com
O15 - Trusted Zone: *.eros-porno.com
O17 - HKLM\System\CCS\Services\Tcpip\..\{F1930768-2624-431A-8351-BDB94ABB59B3}: NameServer = 85.37.17.44 85.38.28.90
O20 - AppInit_DLLs: C:WINDOWS\system32\guard32.dll C:\PROGRA~1\Comodo\Css\cssdll32.dll C:\WINDOWS\system32\guard32.dll
O23 - Service: Lavasoft Ad-Aware Service (aawservice) - Unknown owner - -C:\Programmi\Lavasoft\Ad-Aware\aawservice.exe (file missing)
O23 - Service: cFosSpeed System Service (cFosSpeedS) - Unknown owner - -"C:\Programmi\cFosSpeed\spd.exe" -service (file missing)
O23 - Service: CyberLink Background Capture Service (CBCS) (CLCapSvc) - Unknown owner - c:\APPS\Powercinema\Kernel\TV\CLCapSvc.exe
O23 - Service: CyberLink Task Scheduler (CTS) (CLSched) - Unknown owner - c:\APPS\Powercinema\Kernel\TV\CLSched.exe
O23 - Service: COMODO Firewall Pro Helper Service (cmdAgent) - Unknown owner - C:\Programmi\COMODO\Firewall\cmdagent.exe
O23 - Service: CyberLink Media Library Service - Unknown owner - -"C:\Programmi\CyberLink\Shared Files\CLML_NTService\CLMLServer.exe" (file missing)
O23 - Service: Eset HTTP Server (EhttpSrv) - ESET - C:\Programmi\ESET\ESET NOD32 Antivirus\EHttpSrv.exe
O23 - Service: Eset Service (ekrn) - ESET - C:\Programmi\ESET\ESET NOD32 Antivirus\ekrn.exe
O23 - Service: Generic Service for HID Keyboard Input Collections (GenericHidService) - Unknown owner - c:\APPS\HIDSERVICE\HIDSERVICE.exe
O23 - Service: HDD Information Service (HDDSvc) - AltrixSoft (http://www.altrixsoft.com/) - C:\WINDOWS\system32\HDDSvc.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Unknown owner - -"C:\Programmi\File comuni\InstallShield\Driver\11\Intel 32\IDriverT.exe" (file missing)
O23 - Service: lxcg_device - - C:\WINDOWS\system32\lxcgcoms.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Servizio SiteAdvisor (SiteAdvisor Service) - Unknown owner - -C:\Programmi\SiteAdvisor\6253\SAService.exe (file missing)
O23 - Service: SmartLinkService (SLService) - - C:\WINDOWS\SYSTEM32\slserv.exe
O23 - Service: Ulead Burning Helper (UleadBurningHelper) - Unknown owner - -C:\Programmi\File comuni\Ulead Systems\DVD\ULCDRSvr.exe (file missing)
O23 - Service: Servizio Messenger Sharing Folders USN Journal Reader (usnjsvc) - Unknown owner - -"C:\Programmi\MSN Messenger\usnsvc.exe" (file missing)
O23 - Service: Servizio di condivisione in rete Windows Media Player (WMPNetworkSvc) - Unknown owner - -"C:\Programmi\Windows Media Player\WMPNetwk.exe" (file missing)

--
End of file - 9144 bytes

Ciao . Dimmi se conosci questo programma:C:\Programmi\DeskSlide\DeskSlide.exe -logon -hide
Poi:Prima di fare queste operazioni, hai provato a fare un ripristino configurazione di sistema a una data ANTECEDENTE ?Scegli una data in cui sei sicuro che NON avevi quel problema.
Assicurati di avere accesso a file e cartelle nascosti
(Pannello di controllo-> Opzioni Cartella-> Visualizzazione)
1) Metti la spunta su: Visualizza file e cartelle nascoste
2) Togli la spunta: nascondi file protetti di sistema

Disattiva il ripristino configurazione di sistema, e tienilo disattivato, fino alla soluzione del problema http://guide.aiutamici.com/guide?C1=7&C2=68&ID=80121

Se non sai "fixare"le voci,segui questa guida dettagliata: http://www.aiutaamici.com/software?ID=11175

Avvia in modalità provvisoria http://guide.aiutamici.com/guide?C1=7&C2=68&ID=80122

Avvia hijackthis, metti la spunta alle voci che andrò ad elencarti e con tutte le applicazioni chiuse e disconnesso da Internet,premi su fix checked
O2 - BHO: &Yahoo! Toolbar Helper - {02478D38-C3F9-4efb-9B51-7695ECA05670} - (no file)
O2 - BHO: AddTask Class - {24F06550-65E3-4D1C-8CFE-839C296B5530} - (no file)
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
O15 - Trusted Zone: *.cercoporno.com
O15 - Trusted Zone: *.eros-porno.com
Scarica VIRIT :
http://www.tgsoft.it/italy/download.htm lo aggiorni (cliccando sulla parabola in alto) e lo fai girare in Modalità Provvisoria (è molto importante).

Scarica Spy-Bot da qui http://www.aiutaamici.com/software?ID=10831 e fai una scansione sempre in Modalità Provvisoria.

Dai una pulita (registro compreso)con CCleaner http://www.aiutaamici.com/software?ID=11223

Riavvia il computer.

Fai una scansione on-line con questo http://housecall.trendmicro.com/it/
Ricordati di rinascondere le cartelle di sistema;
Riattiva il ripristino configurazione di sistema e, se tutto è a posto, creane uno nuovo.