Muchas gracias, chic@s .

Voy siguiendo vuestros consejos paso a paso. De momento he hecho lo indicado por francisco157, y tras enviar este mensaje con el reporte del Kaspersky para que me cuentes lo que ves, procederé a lo dicho por miangopa23 para enviar el reporte del AVG y demás.

Reporte Kaspersky:
KASPERSKY ONLINE SCANNER REPORT
Sunday, March 30, 2008 9:52:23 PM
Operating System: Microsoft Windows XP Professional, (Build 2600)
Kaspersky Online Scanner version: 5.0.98.0
Kaspersky Anti-Virus database last update: 30/03/2008
Kaspersky Anti-Virus database records: 604690
-------------------------------------------------------------------------------

Scan Settings:
Scan using the following antivirus database: standard
Scan Archives: true
Scan Mail Bases: true

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

Scan Statistics:
Total number of scanned objects: 96930
Number of viruses found: 1
Number of infected objects: 2
Number of suspicious objects: 0
Duration of the scan process: 01:21:36

Infected Object Name / Virus Name / Last Action
C:\Archivos de programa\ESET\cache\CACHE.NDB Object is locked skipped
C:\Archivos de programa\ESET\cache\FND0.NFI Infected: Trojan-Downloader.Win32.Agent.lxa skipped
C:\Archivos de programa\ESET\infected\VTKJATDA.NQF Infected: Trojan-Downloader.Win32.Agent.lxa skipped
C:\Archivos de programa\ESET\logs\virlog.dat Object is locked skipped
C:\Archivos de programa\ESET\logs\warnlog.dat Object is locked skipped
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\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:\Documents and Settings\User1\Configuración local\Archivos temporales de Internet\Content.IE5\index.dat Object is locked skipped
C:\Documents and Settings\User1\Configuración local\Datos de programa\Microsoft\Windows\UsrClass.dat Object is locked skipped
C:\Documents and Settings\User1\Configuración local\Datos de programa\Microsoft\Windows\UsrClass.dat.LOG Object is locked skipped
C:\Documents and Settings\User1\Configuración local\Datos de programa\SupportSoft\Telefonica\User1\state\logs\s prtcmd.log Object is locked skipped
C:\Documents and Settings\User1\Configuración local\Historial\History.IE5\index.dat Object is locked skipped
C:\Documents and Settings\User1\Configuración local\Historial\History.IE5\MSHist0120080330200803 31\index.dat Object is locked skipped
C:\Documents and Settings\User1\Cookies\index.dat Object is locked skipped
C:\Documents and Settings\User1\Datos de programa\SUPERAntiSpyware.com\SUPERAntiSpyware\App Logs\SUPERANTISPYWARE-3-30-2008( 20-16-4 ).LOG Object is locked skipped
C:\Documents and Settings\User1\ntuser.dat Object is locked skipped
C:\Documents and Settings\User1\ntuser.dat.LOG Object is locked skipped
C:\Documents and Settings\User1\UserData\index.dat Object is locked skipped
C:\System Volume Information\catalog.wci\00000002.ps1 Object is locked skipped
C:\System Volume Information\catalog.wci\00000002.ps2 Object is locked skipped
C:\System Volume Information\catalog.wci\00010009.ci Object is locked skipped
C:\System Volume Information\catalog.wci\cicat.fid Object is locked skipped
C:\System Volume Information\catalog.wci\cicat.hsh Object is locked skipped
C:\System Volume Information\catalog.wci\CiCL0001.000 Object is locked skipped
C:\System Volume Information\catalog.wci\CiP10000.000 Object is locked skipped
C:\System Volume Information\catalog.wci\CiP20000.000 Object is locked skipped
C:\System Volume Information\catalog.wci\CiPT0000.000 Object is locked skipped
C:\System Volume Information\catalog.wci\CiSL0001.000 Object is locked skipped
C:\System Volume Information\catalog.wci\CiSP0000.000 Object is locked skipped
C:\System Volume Information\catalog.wci\CiST0000.000 Object is locked skipped
C:\System Volume Information\catalog.wci\CiVP0000.000 Object is locked skipped
C:\System Volume Information\catalog.wci\INDEX.000 Object is locked skipped
C:\System Volume Information\catalog.wci\propstor.bk1 Object is locked skipped
C:\System Volume Information\catalog.wci\propstor.bk2 Object is locked skipped
C:\System Volume Information\_restore{512D29E8-C48C-43AF-8EBD-112719589863}\RP1\change.log Object is locked skipped
C:\WINDOWS\CSC\00000001 Object is locked 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\Sti_Trace.log 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\config\systemprofile\Configura ción local\Archivos temporales de Internet\Content.IE5\KX6F4XUR\loader[1].exe 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\wiadebug.log Object is locked skipped
C:\WINDOWS\wiaservc.log Object is locked skipped

Scan process completed.



De nuevo muchas gracias a los dos.