Quando dou o comando:
ctrl+alt+del
Aparece o seguinte erro:

Quando dou o comando:
Executar: regedit
Aparece o seguinte erro:

Quando dou o comando:
Executar: gpedit.msc
Aparece o seguinte erro:

Além destes diversosproblemas quando está ativo não consigo instalar nenhum antivirus. Ontem executei o malwarebyte e a ameaça foi removida e consegui instalar o norton antivirus, pois o avast não dava para abrir ainda. Ja mandei scanear mas o problema não se resolveu. Hoje quando mandei o malwarebyte scanear novamente, não encontrou nenhuma ameaça e o problema ainda existe. Na minha opinião este problema é muito difícil de resolver, gostaria de estar aprendendo um pouco mais resolvendo este problema, e gostaria de que lguém pudesse me ajudar.
Grato.
LOG
Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 10:59:18, on 30/12/2010
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Unable to get Internet Explorer version!
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\spoolsv.exe
C:\WINDOWS\system32\cmpe.exe
C:\Arquivos de programas\NVIDIA Corporation\NetworkAccessManager\Apache Group\Apache2\bin\apache.exe
C:\Arquivos de programas\Arquivos comuns\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\Arquivos de programas\Norton AntiVirus\Engine\16.0.0.125\ccSvcHst.exe
C:\Arquivos de programas\NVIDIA Corporation\NetworkAccessManager\bin\nSvcIp.exe
C:\Arquivos de programas\NVIDIA Corporation\NetworkAccessManager\bin\nSvcLog.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\slserv.exe
C:\Arquivos de programas\NVIDIA Corporation\NetworkAccessManager\bin\nSvcAppFlt.exe
C:\WINDOWS\Explorer.EXE
C:\Arquivos de programas\NVIDIA Corporation\NetworkAccessManager\Apache Group\Apache2\bin\apache.exe
C:\Arquivos de programas\Norton AntiVirus\Engine\16.0.0.125\ccSvcHst.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\WINDOWS\system32\RUNDLL32.EXE
C:\DOCUME~1\TODOMU~1\CONFIG~1\Temp\windyttp.exe
C:\Arquivos de programas\Norton AntiVirus\Engine\16.0.0.125\MCUI32.EXE
C:\WINDOWS\system32\svchost.exe
C:\Arquivos de programas\Mozilla Firefox\firefox.exe
C:\Arquivos de programas\Mozilla Firefox\plugin-container.exe
C:\WINDOWS\Explorer.EXE
C:\Documents and Settings\TodoMundo\Meus documentos\Downloads\HiJackThis.exe
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 = about:blank
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 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:\Arquivos de programas\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: WormRadar.com IESiteBlocker.NavFilter - {3CA2F312-6F6E-4B53-A66E-4E65E497C8C0} - C:\Arquivos de programas\AVG\AVG8\avgssie.dll (file missing)
O2 - BHO: Symantec Intrusion Prevention - {6D53EC84-6AAE-4787-AEEE-F4628F01010C} - C:\Arquivos de programas\Norton AntiVirus\Engine\16.0.0.125\IPSBHO.DLL
O2 - BHO: Auxiliar de Conexão do Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Arquivos de programas\Arquivos comuns\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: AVG Security Toolbar - {A057A204-BACC-4D26-9990-79A187E2698E} - C:\ARQUIV~1\AVG\AVG8\AVGTOO~1.DLL (file missing)
O2 - BHO: Ask Toolbar - {D4027C7F-154A-4066-A1AD-4243D8127440} - C:\Arquivos de programas\Ask.com\GenericAskToolbar.dll
O3 - Toolbar: Ask Toolbar - {D4027C7F-154A-4066-A1AD-4243D8127440} - C:\Arquivos de programas\Ask.com\GenericAskToolbar.dll
O3 - Toolbar: Barra de Ferramentas do Yahoo! com bloqueador de pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Arquivos de programas\Yahoo!\Companion\Installs\cpn\yt.dll
O3 - Toolbar: AVG Security Toolbar - {A057A204-BACC-4D26-9990-79A187E2698E} - C:\ARQUIV~1\AVG\AVG8\AVGTOO~1.DLL (file missing)
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [nTrayFw] C:\Arquivos de programas\NVIDIA Corporation\NetworkAccessManager\bin\nTrayFw.exe
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: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKUS\S-1-5-19\..\RunOnce: [_nltide_2] regsvr32 /s /n /i:U shell32 (User 'LOCAL SERVICE'
O4 - HKUS\S-1-5-19\..\RunOnce: [_nltide_3] rundll32 advpack.dll,LaunchINFSectionEx nLite.inf,C,,4,N (User 'LOCAL SERVICE'
O4 - HKUS\S-1-5-20\..\RunOnce: [_nltide_2] regsvr32 /s /n /i:U shell32 (User 'NETWORK SERVICE'
O4 - HKUS\S-1-5-18\..\RunOnce: [_nltide_2] regsvr32 /s /n /i:U shell32 (User 'SYSTEM'
O4 - HKUS\.DEFAULT\..\RunOnce: [_nltide_2] regsvr32 /s /n /i:U shell32 (User 'Default user'
O7 - HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System, DisableRegedit=1
O9 - Extra button: Pesquisar - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\ARQUIV~1\MICROS~1\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
O14 - IERESET.INF: SEARCH_PAGE_URL=&http://home.microsoft.com/intl/br/access/allinone.asp
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (YInstStarter Class) - C:\Arquivos de programas\Yahoo!\Common\yinsthelper.dll
O17 - HKLM\System\CCS\Services\Tcpip\..\{CA0C8C8A-F88D-4FAB-90FD-04BB0A574AF2}: NameServer = 200.165.132.147 200.165.132.155
O18 - Protocol: linkscanner - {F274614C-63F8-47D5-A4D1-FBDDE494F8D1} - C:\Arquivos de programas\AVG\AVG8\avgpp.dll (file missing)
O22 - SharedTaskScheduler: Pré-carregador Browseui - {438755C2-A8BA-11D1-B96B-00A0C90312E1} - C:\WINDOWS\system32\browseui.dll
O22 - SharedTaskScheduler: Daemon de cache de categorias de componente - {8C7461EF-2B13-11d2-BE35-3078302C2030} - C:\WINDOWS\system32\browseui.dll
O23 - Service: Norton2009 Reset (.norton2009Reset) - Unknown owner - C:\Arquivos de programas\Norton2009Reset.exe (file missing)
O23 - Service: Context Manager Process Extension (cmpe) - LightComm - C:\WINDOWS\system32\cmpe.exe
O23 - Service: Symantec Eraser Service (EraserSvc11013) - Symantec Corporation - C:\Arquivos de programas\Norton AntiVirus\Engine\16.0.0.125\ccSvcHst.exe
O23 - Service: ForceWare Intelligent Application Manager (IAM) - Unknown owner - C:\Arquivos de programas\NVIDIA Corporation\NetworkAccessManager\bin\nSvcAppFlt.exe
O23 - Service: Forceware Web Interface (ForcewareWebInterface) - Apache Software Foundation - C:\Arquivos de programas\NVIDIA Corporation\NetworkAccessManager\Apache Group\Apache2\bin\apache.exe
O23 - Service: Windows Installer (MSIServer) - Unknown owner - C:\WINDOWS\system32\msiexec.exe (file missing)
O23 - Service: Norton AntiVirus - Symantec Corporation - C:\Arquivos de programas\Norton AntiVirus\Engine\16.0.0.125\ccSvcHst.exe
O23 - Service: ForceWare IP service (nSvcIp) - NVIDIA - C:\Arquivos de programas\NVIDIA Corporation\NetworkAccessManager\bin\nSvcIp.exe
O23 - Service: ForceWare user log service (nSvcLog) - NVIDIA - C:\Arquivos de programas\NVIDIA Corporation\NetworkAccessManager\bin\nSvcLog.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: SmartLinkService (SLService) - Smart Link - C:\WINDOWS\SYSTEM32\slserv.exe
--
End of file - 7388 bytes