Hola de nuevo, muchas gracias por la ayuda que me brindas. Seguí los pasos tal y como me lo indicaste. Ésto es lo que los análisis arrojaron:

El superantispyware encontró ésto:

Adware.Lop
Adware.Tracking Cookie

Están en cuarentena y supongo que los tengo que eliminar para que desaparesca mi problema del Cid, porque todavía lo tengo.

El informe de Malwarebytes:

Malwarebytes' Anti-Malware 1.23
Versión de la Base de Datos: 986
Windows 5.1.2600 Service Pack 1

03:41:20 p.m. 24/07/2008
mbam-log-7-24-2008 (15-41-20).txt

Tipo de examen : Examen Completo (C:\|)
Objetos examinados: 180515
Tiempo transcurrido: 2 hour(s), 52 minute(s), 47 second(s)

Procesos en Memoria Infectados: 0
Módulos en Memoria Infectados: 0
Claves del Registro Infectadas: 25
Valores del Registro Infectados: 1
Elementos de Datos del Registro Infectados: 0
Carpetas Infectadas: 2
Ficheros Infectados: 6

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

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

Claves del Registro Infectadas:
HKEY_CLASSES_ROOT\dnscache.dnscacheobj (Trojan.Vundo) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\dnscache.dnscacheobj.1 (Trojan.Vundo) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\gnucdna.core (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\TypeLib\{2850bdc7-2330-4e31-9fa0-88268846539a} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{0be385a3-85a5-4722-b677-68dae891ff21} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{272c0d60-0561-4c83-b3db-eb0a71f9d2eb} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{284477e4-a7cb-4055-9e1b-0ea7cba28945} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{70ca4938-6a0f-4641-a9a9-c936e4c1e7de} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{7468213e-010e-4ec6-a17d-642e909ba7ec} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{89dc33a2-f86f-42a1-8b5f-d4d1943efc9c} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{a916af3c-976d-4358-8736-95bea0b5fd2c} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{b86f4810-19a9-4050-9ac9-b5cf60b5799a} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{bb5b7e14-f8b4-4365-a24d-f4965c33e1ee} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{be45f056-e005-437b-be88-23acf70b0b6a} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{c13d4627-02f5-4b03-897a-bf6a90022dd2} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{c636f1fc-6ae4-4e6a-90ab-6d61d821a0dd} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{cb971ac0-6408-40da-a540-92f9f256f51f} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{d5694dfe-43b6-4e05-aa29-8c556c968973} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{e2032ec2-a9ac-4ed7-9bdb-ebecacf076f2} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{ebab4a71-8c34-461a-b57d-dd041d439555} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{f06fea43-0cc3-4bf6-a85b-5efb1c07aa4b} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{fc94a0f7-9c7c-4ae2-9106-5c212332b209} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\CLSID\{f02c0ae1-d796-42c9-81e1-084d88f79b8e} (Adware.WhenUSave) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Trymedia Systems (Adware.Trymedia) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Ares Gold (Adware.WhenUSave) -> Quarantined and deleted successfully.

Valores del Registro Infectados:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\SharedDLLs\C:\WINDOWS\System32\GnucDNA. dll (Adware.WhenUSave) -> Quarantined and deleted successfully.

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

Carpetas Infectadas:
C:\Archivos de programa\Ares Gold (Adware.WhenUSave) -> Quarantined and deleted successfully.
C:\Archivos de programa\Ares Gold\Data (Adware.WhenUSave) -> Quarantined and deleted successfully.

Ficheros Infectados:
C:\WINDOWS\system32\GnucDNA.dll (Adware.WhenUSave) -> Quarantined and deleted successfully.
C:\Archivos de programa\Ares Gold\Data\cache.net (Adware.WhenUSave) -> Quarantined and deleted successfully.
C:\Archivos de programa\Ares Gold\Data\MyMedia.edb (Adware.WhenUSave) -> Quarantined and deleted successfully.
C:\Archivos de programa\Ares Gold\Data\searchkeys.dat (Adware.WhenUSave) -> Quarantined and deleted successfully.
C:\Archivos de programa\Ares Gold\Data\ultracache.net (Adware.WhenUSave) -> Quarantined and deleted successfully.
C:\Archivos de programa\Ares Gold\Data\webcache.net (Adware.WhenUSave) -> Quarantined and deleted successfully.

De nuevo, los archivos infectados están en cuarentena, y supongo que debo eliminarlos también.

Espero me puedas dar luz verde para eliminar todos los archivos en cuarentena para poder ver los resultados.
Gracias otra vez.