Aquí viene el siguiente:

Malwarebytes' Anti-Malware 1.08
Versión de la Base de Datos: 501

Tipo de examen : Examen Completo (C:\|)
Objetos examinados: 142461
Tiempo transcurrido: 36 minute(s), 48 second(s)

Procesos en Memoria Infectados: 0
Módulos en Memoria Infectados: 0
Claves del Registro Infectadas: 0
Valores del Registro Infectados: 0
Elementos de Datos del Registro Infectados: 0
Carpetas Infectadas: 1
Ficheros Infectados: 20

Procesos en Memoria Infectados:
(No se han detectado elementos maliciosos)

Módulos en Memoria Infectados:
(No se han detectado elementos maliciosos)

Claves del Registro Infectadas:
(No se han detectado elementos maliciosos)

Valores del Registro Infectados:
(No se han detectado elementos maliciosos)

Elementos de Datos del Registro Infectados:
(No se han detectado elementos maliciosos)

Carpetas Infectadas:
C:\WINDOWS1\system32\drivers\down (Trojan.Downloader) -> Quarantined and deleted successfully.

Ficheros Infectados:
C:\WINDOWS1\system32\drivers\down\200281.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\200750.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\204218.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\206625.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\208953.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\210609.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\213125.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\250187.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\257343.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\259828.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\262234.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\280000.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\285921.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\288203.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\288718.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\291500.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\328796.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\down\340500.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS1\system32\drivers\hldrrr.exe (Rootkit.Agent) -> Delete on reboot.
C:\WINDOWS1\system32\drivers\srosa.sys (Rootkit.Agent) -> Quarantined and deleted successfully.

Como podeis ver vuelve a salir el hldrrr.exe y el srosa.sys.Voy a reiniciar para eliminar lo que no ha podido,ejecutando antes el SafeMode Repair para poder entrar en Modo Seguro y enseguida os reporto lo sucedido... me jodieron,no puedo ejecutarlo,me dice que no es una aplicación Win32 válida......pues reinicio y ya os cuento...