Hola antes que todo, he estado checando el espacio y llegue aqui por la razon de que mi maquina se infecto y en este foro me di cuenta de que han ayudado a algunas personas con un problema similar al que yo tengo, relacionado con una pantalla emergente, que indica que la computadora se encuentra infectada, y otra stuacion es que el fondo de pantalla se ha cambiado por uno de color azul con una lellenda similar.
Espero me puedan alludar, lo he intentado solucionar, todas las veces sin exito.
Les dejo el registro de Hijackthis para ver que se puede hacer.

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 12:52:16 a.m., on 02/04/2008
Platform: Windows Vista (WinNT 6.00.1904)
MSIE: Internet Explorer v7.00 (7.00.6000.16609)
Boot mode: Normal

Running processes:
C:\Windows\system32\Dwm.exe
C:\Windows\system32\taskeng.exe
C:\Windows\Explorer.EXE
C:\Program Files\McAfee\MPS\mpsevh.exe
C:\Program Files\Windows Defender\MSASCui.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Program Files\Intel\Intel Matrix Storage Manager\IAAnotif.exe
C:\Windows\sttray.exe
C:\Program Files\Camera Assistant Software for Gateway\traybar.exe
C:\Program Files\McAfee\MSK\mskagent.exe
C:\Program Files\BigFix\bigfix.exe
C:\Program Files\SiteAdvisor\6253\SiteAdv.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Windows\System32\igfxtray.exe
C:\Windows\System32\hkcmd.exe
C:\Windows\System32\igfxpers.exe
C:\Program Files\Common Files\InstallShield\UpdateService\issch.exe
C:\Program Files\Camera Assistant Software for Gateway\CEC_MAIN.exe
C:\Windows\system32\igfxsrvc.exe
C:\Windows\sysatjsicj.exe
C:\Windows\sysawechod.exe
C:\Windows\sysahbecjh.exe
C:\Windows\sysabmpmfr.exe
C:\Program Files\Protector Suite QL\psqltray.exe
C:\Windows\ehome\ehtray.exe
C:\Program Files\Windows Live\Messenger\msnmsgr.exe
C:\Program Files\Windows Media Player\wmpnscfg.exe
C:\Program Files\Windows Mail\WinMail.exe
C:\Program Files\Nokia\Nokia PC Suite 6\PCSuite.exe
C:\Program Files\WIDCOMM\Bluetooth Software\BTTray.exe
C:\Windows\ehome\ehmsas.exe
C:\Program Files\WIDCOMM\Bluetooth Software\BtStackServer.exe
c:\PROGRA~1\mcafee.com\agent\mcagent.exe
C:\Windows\system32\SearchFilterHost.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.gateway.com/g/startpage.html?Ch=Retail&SubCH=nofound&Br=GTW&Loc= SPN_MX&Sys=PTB&M=M-6804m
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://www.gateway.com/g/startpage.html?Ch=Retail&SubCH=nofound&Br=GTW&Loc= SPN_MX&Sys=PTB&M=M-6804m
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://www.gateway.com/g/sidepanel.html?Ch=Retail&SubCH=nofound&Br=GTW&Loc= SPN_MX&Sys=PTB&M=M-6804m
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Int ernet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
F2 - REG:system.ini: UserInit=Userinit.exe
O1 - Hosts: ::1 localhost
O2 - BHO: Aplicación auxiliar de vínculos de Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {089FD14D-132B-48FC-8861-0048AE113215} - C:\Program Files\SiteAdvisor\6253\SiteAdv.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O2 - BHO: scriptproxy - {7DB2D5A0-7241-4E79-B68D-6309F01C5231} - c:\PROGRA~1\mcafee\VIRUSS~1\scriptcl.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Windows Live Aplicación auxiliar de inicio de sesión - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Browser Address Error Redirector - {CA6319C0-31B7-401E-A518-A07C3DB8F777} - c:\windows\system32\BAE.dll
O3 - Toolbar: McAfee SiteAdvisor - {0BF43445-2F28-4351-9252-17FE6E806AA0} - C:\Program Files\SiteAdvisor\6253\SiteAdv.dll
O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [PSQLLauncher] "C:\Program Files\Protector Suite QL\launcher.exe" /startup
O4 - HKLM\..\Run: [IAAnotif] "C:\Program Files\Intel\Intel Matrix Storage Manager\Iaanotif.exe"
O4 - HKLM\..\Run: [SigmatelSysTrayApp] sttray.exe
O4 - HKLM\..\Run: [Camera Assistant Software] "C:\Program Files\Camera Assistant Software for Gateway\traybar.exe"
O4 - HKLM\..\Run: [MskAgentexe] C:\Program Files\McAfee\MSK\MskAgent.exe
O4 - HKLM\..\Run: [BigFix] c:\program files\Bigfix\bigfix.exe /atstartup
O4 - HKLM\..\Run: [SiteAdvisor] C:\Program Files\SiteAdvisor\6253\SiteAdv.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [IgfxTray] C:\Windows\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\Windows\system32\hkcmd.exe
O4 - HKLM\..\Run: [Persistence] C:\Windows\system32\igfxpers.exe
O4 - HKLM\..\Run: [ISUSScheduler] "C:\Program Files\Common Files\InstallShield\UpdateService\issch.exe" -start
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [{2C70168B-97CE-4f31-B85D-1FEC5002721D}] "C:\Windows\sysavxjgdu.exe"
O4 - HKLM\..\Run: [{9754B85A-3B34-4969-BE1F-CD03227E9470}] "C:\Windows\sysatjsicj.exe"
O4 - HKLM\..\Run: [{BAAA759D-56F0-428c-B8DA-827EA3B08C2C}] "C:\Windows\sysawechod.exe"
O4 - HKLM\..\Run: [{7DD4A7AC-A3F1-4495-884A-7947C5B89108}] "C:\Windows\sysahbecjh.exe"
O4 - HKLM\..\Run: [{DD651081-A909-45ad-BD71-2335B0ADE043}] "C:\Windows\sysabmpmfr.exe"
O4 - HKLM\..\RunOnce: [Launcher] %WINDIR%\SMINST\launcher.exe
O4 - HKCU\..\Run: [WindowsWelcomeCenter] rundll32.exe oobefldr.dll,ShowWelcomeCenter
O4 - HKCU\..\Run: [ehTray.exe] C:\Windows\ehome\ehTray.exe
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\Windows Live\Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [WMPNSCFG] C:\Program Files\Windows Media Player\WMPNSCFG.exe
O4 - HKCU\..\Run: [ISUSPM Startup] "C:\Program Files\Common Files\InstallShield\UpdateService\ISUSPM.exe" -startup
O4 - HKCU\..\Run: [PC Suite Tray] "C:\Program Files\Nokia\Nokia PC Suite 6\PCSuite.exe" -onlytray
O4 - HKUS\S-1-5-19\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User 'SERVICIO LOCAL')
O4 - HKUS\S-1-5-19\..\Run: [WindowsWelcomeCenter] rundll32.exe oobefldr.dll,ShowWelcomeCenter (User 'SERVICIO LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User 'Servicio de red')
O4 - HKUS\S-1-5-18\..\Run: [Nokia.PCSync] "C:\Program Files\Nokia\Nokia PC Suite 6\PcSync2.exe" /NoDialog (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\RunOnce: [DelayShred] "c:\program files\mcafee\mshr\ShrCL.EXE" /P7 /q C:\Users\James\AppData\Local\Temp\Low\HSPERF~1.SH! C:\Users\James\AppData\Local\Temp\HSPERF~1.SH! (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [Nokia.PCSync] "C:\Program Files\Nokia\Nokia PC Suite 6\PcSync2.exe" /NoDialog (User 'Default user')
O4 - HKUS\.DEFAULT\..\RunOnce: [DelayShred] "c:\program files\mcafee\mshr\ShrCL.EXE" /P7 /q C:\Users\James\AppData\Local\Temp\Low\HSPERF~1.SH! C:\Users\James\AppData\Local\Temp\HSPERF~1.SH! (User 'Default user')
O4 - Startup: Recorte de pantalla e Inicio rápido de OneNote 2007.lnk = C:\Program Files\Microsoft Office\Office12\ONENOTEM.EXE
O4 - Global Startup: BTTray.lnk = ?
O4 - Global Startup: hpoddt01.exe.lnk = ?
O8 - Extra context menu item: E&xportar a Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O8 - Extra context menu item: Enviar imagen al dispositivo &Bluetooth... - C:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie_ctx.htm
O8 - Extra context menu item: Enviar página al dispositivo &Bluetooth... - C:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_01\bin\npjpi160_01.dll
O9 - Extra 'Tools' menuitem: Consola de Sun Java - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_01\bin\npjpi160_01.dll
O9 - Extra button: Enviar a OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: &Enviar a OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
O9 - Extra button: @btrez.dll,-4015 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - C:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O9 - Extra 'Tools' menuitem: @btrez.dll,-12650 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - C:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O13 - Gopher Prefix:
O16 - DPF: {DA141806-BBCA-4B58-86EF-4FA8093B941D} (JpgViewLe Control) - http://192.168.1.65/jpgviewle.cab
O23 - Service: Agere Modem Call Progress Audio (AgereModemAudio) - Agere Systems - C:\Windows\system32\agrsmsvc.exe
O23 - Service: Apple Mobile Device - Apple, Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: Autodesk Licensing Service - Autodesk - C:\Program Files\Common Files\Autodesk Shared\Service\AdskScSrv.exe
O23 - Service: Servicio Bonjour (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: McAfee E-mail Proxy (Emproxy) - McAfee, Inc. - C:\PROGRA~1\COMMON~1\McAfee\EmProxy\emproxy.exe
O23 - Service: Intel(R) Matrix Storage Event Monitor (IAANTMON) - Intel Corporation - C:\Program Files\Intel\Intel Matrix Storage Manager\Iaantmon.exe
O23 - Service: Servicio del iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: McAfee HackerWatch Service - McAfee, Inc. - C:\Program Files\Common Files\McAfee\HackerWatch\HWAPI.exe
O23 - Service: McAfee Update Manager (mcmispupdmgr) - McAfee, Inc. - C:\PROGRA~1\McAfee\MSC\mcupdmgr.exe
O23 - Service: McAfee Services (mcmscsvc) - McAfee, Inc. - C:\PROGRA~1\McAfee\MSC\mcmscsvc.exe
O23 - Service: McAfee Network Agent (McNASvc) - McAfee, Inc. - c:\program files\common files\mcafee\mna\mcnasvc.exe
O23 - Service: McAfee Scanner (McODS) - McAfee, Inc. - C:\PROGRA~1\McAfee\VIRUSS~1\mcods.exe
O23 - Service: McAfee Protection Manager (mcpromgr) - McAfee, Inc. - C:\PROGRA~1\McAfee\MSC\mcpromgr.exe
O23 - Service: McAfee Proxy Service (McProxy) - McAfee, Inc. - c:\PROGRA~1\COMMON~1\mcafee\mcproxy\mcproxy.exe
O23 - Service: McAfee Redirector Service (McRedirector) - McAfee, Inc. - c:\PROGRA~1\COMMON~1\mcafee\redirsvc\redirsvc.exe
O23 - Service: McAfee Real-time Scanner (McShield) - McAfee, Inc. - C:\PROGRA~1\McAfee\VIRUSS~1\mcshield.exe
O23 - Service: McAfee SystemGuards (McSysmon) - McAfee, Inc. - C:\PROGRA~1\McAfee\VIRUSS~1\mcsysmon.exe
O23 - Service: McAfee Personal Firewall Service (MpfService) - McAfee, Inc. - C:\Program Files\McAfee\MPF\MPFSrv.exe
O23 - Service: McAfee Privacy Service (MPS9) - McAfee, Inc. - C:\PROGRA~1\McAfee\MPS\mps.exe
O23 - Service: McAfee SpamKiller Service (MSK80Service) - McAfee Inc. - C:\Program Files\McAfee\MSK\MskSrver.exe
O23 - Service: ServiceLayer - Nokia. - C:\Program Files\PC Connectivity Solution\ServiceLayer.exe
O23 - Service: Servicio SiteAdvisor (SiteAdvisor Service) - Unknown owner - C:\Program Files\SiteAdvisor\6253\SAService.exe
O23 - Service: SigmaTel Audio Service (STacSV) - IDT, Inc. - C:\Program Files\IDT\WDM\STacSV.exe

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End of file - 11461 bytes

Chido por lo que hacen y gracias por la respuesta.