Hice eso que me dijiste, despues ejecute el ewido hizo el scan y no detecto nada, despues ejecute el kasperky y este fue el resultado

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KASPERSKY ONLINE SCANNER REPORT
Monday, November 06, 2006 10:19:20 PM
Operating System: Microsoft Windows XP Professional, Service Pack 1 (Build 2600)
Kaspersky Online Scanner version: 5.0.83.0
Kaspersky Anti-Virus database last update: 7/11/2006
Kaspersky Anti-Virus database records: 225165
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Scan Settings:
Scan using the following antivirus database: standard
Scan Archives: true
Scan Mail Bases: true

Scan Target - My Computer:
A:\
C:\
D:\
E:\

Scan Statistics:
Total number of scanned objects: 17520
Number of viruses found: 1
Number of infected objects: 1 / 0
Number of suspicious objects: 0
Duration of the scan process: 00:15:56

Infected Object Name / Virus Name / Last Action
C:\Documents and Settings\All Users\Datos de programa\Microsoft\Network\Downloader\qmgr0.dat Object is locked skipped
C:\Documents and Settings\All Users\Datos de programa\Microsoft\Network\Downloader\qmgr1.dat Object is locked skipped
C:\Documents and Settings\Leonardo Guandalini\Configuración local\Archivos temporales de Internet\Content.IE5\index.dat Object is locked skipped
C:\Documents and Settings\Leonardo Guandalini\Configuración local\Datos de programa\Microsoft\Windows\UsrClass.dat Object is locked skipped
C:\Documents and Settings\Leonardo Guandalini\Configuración local\Datos de programa\Microsoft\Windows\UsrClass.dat.LOG Object is locked skipped
C:\Documents and Settings\Leonardo Guandalini\Configuración local\Historial\History.IE5\index.dat Object is locked skipped
C:\Documents and Settings\Leonardo Guandalini\Configuración local\Historial\History.IE5\MSHist0120061106200611 07\index.dat Object is locked skipped
C:\Documents and Settings\Leonardo Guandalini\Configuración local\Temp\hpodvd09.log Object is locked skipped
C:\Documents and Settings\Leonardo Guandalini\Configuración local\Temp\Perflib_Perfdata_5c4.dat Object is locked skipped
C:\Documents and Settings\Leonardo Guandalini\Cookies\index.dat Object is locked skipped
C:\Documents and Settings\Leonardo Guandalini\NTUSER.DAT Object is locked skipped
C:\Documents and Settings\Leonardo Guandalini\ntuser.dat.LOG Object is locked skipped
C:\Documents and Settings\Leonardo Guandalini\UserData\index.dat Object is locked skipped
C:\Documents and Settings\LocalService\Configuración local\Archivos temporales de Internet\Content.IE5\index.dat Object is locked skipped
C:\Documents and Settings\LocalService\Configuración local\Datos de programa\Microsoft\Windows\UsrClass.dat Object is locked skipped
C:\Documents and Settings\LocalService\Configuración local\Datos de programa\Microsoft\Windows\UsrClass.dat.LOG Object is locked skipped
C:\Documents and Settings\LocalService\Configuración local\Historial\History.IE5\index.dat Object is locked skipped
C:\Documents and Settings\LocalService\Cookies\index.dat Object is locked skipped
C:\Documents and Settings\LocalService\NTUSER.DAT Object is locked skipped
C:\Documents and Settings\LocalService\ntuser.dat.LOG Object is locked skipped
C:\Documents and Settings\NetworkService\Configuración local\Datos de programa\Microsoft\Windows\UsrClass.dat Object is locked skipped
C:\Documents and Settings\NetworkService\Configuración local\Datos de programa\Microsoft\Windows\UsrClass.dat.LOG Object is locked skipped
C:\Documents and Settings\NetworkService\NTUSER.DAT Object is locked skipped
C:\Documents and Settings\NetworkService\ntuser.dat.LOG Object is locked skipped
C:\RECYCLER\S-1-5-21-776561741-1532298954-682003330-1003\Dc3\config.exe Infected: Backdoor.Win32.Rbot.gen skipped
C:\WINDOWS\Debug\oakley.log Object is locked skipped
C:\WINDOWS\Debug\PASSWD.LOG Object is locked skipped
C:\WINDOWS\SchedLgU.Txt Object is locked skipped
C:\WINDOWS\SoftwareDistribution\EventCache\{620387 05-2B15-4FBF-AAF4-61153474E053}.bin Object is locked skipped
C:\WINDOWS\SoftwareDistribution\ReportingEvents.lo g Object is locked skipped
C:\WINDOWS\system32\config\Antivirus.Evt Object is locked skipped
C:\WINDOWS\system32\config\AppEvent.Evt Object is locked skipped
C:\WINDOWS\system32\config\default Object is locked skipped
C:\WINDOWS\system32\config\default.LOG Object is locked skipped
C:\WINDOWS\system32\config\SAM Object is locked skipped
C:\WINDOWS\system32\config\SAM.LOG Object is locked skipped
C:\WINDOWS\system32\config\SecEvent.Evt Object is locked skipped
C:\WINDOWS\system32\config\SECURITY Object is locked skipped
C:\WINDOWS\system32\config\SECURITY.LOG Object is locked skipped
C:\WINDOWS\system32\config\software Object is locked skipped
C:\WINDOWS\system32\config\software.LOG Object is locked skipped
C:\WINDOWS\system32\config\SysEvent.Evt Object is locked skipped
C:\WINDOWS\system32\config\system Object is locked skipped
C:\WINDOWS\system32\config\system.LOG Object is locked skipped
C:\WINDOWS\system32\h323log.txt Object is locked skipped
C:\WINDOWS\system32\wbem\Repository\FS\INDEX.BTR Object is locked skipped
C:\WINDOWS\system32\wbem\Repository\FS\OBJECTS.DAT A Object is locked skipped
C:\WINDOWS\WindowsUpdate.log Object is locked skipped

Scan process completed.

Y luego ejecute el Regseeker y hice una limpieza del registro y encontro un error en el registro de hkey_local_machine en software\pepiMK Software con descripcion de entrada obsoleta.
Igualmente siguen saltando ventanas que me dicen que el registro esta sucio y que ejecute comandos como fixcreg.com