bueno, ante todo muchas gracias por la atencion recibida.

el problema ya se ha solucionado, y a no ser que haya algo oculto el ordenador parece totalmente limpio.

tengo otro ordenador que de tanto bicho parece la casa de la familia monster y no me hago con el, le he pasado el aswbmr y me salen 4 conceptos en amarillo y pone "looked" y uno en rojo " unknow"
abrire un ulo nuevo con el report para que lo veais,

como me aconsejais que titule el hilo para que sea de mas ayuda ara otros que les suceda igual?

hola amigos , he utilizado la erramienta de abast y he encontrado malware en el bmr




aswMBR version 1.0.1.2041 Copyright(c) 2014 AVAST Software
Run date: 2014-10-06 19:58:01
-----------------------------
19:58:01.171    OS Version: Windows x64 6.1.7601 Service Pack 1
19:58:01.171    Number of processors: 2 586 0x603
19:58:01.172    ComputerName: PILAR-PC  UserName: Pilar
19:58:02.029    Initialize success
19:58:02.030    VM: initialized successfully
19:58:02.049    VM: Amd CPU supported virtualized
19:58:18.216    VM: supported disk I/O storport.sys
19:58:21.549    AVAST engine defs: 14100600
19:58:32.980    Disk 0 (boot) \Device\Harddisk0\DR0 -> \Device\0000005c
19:58:32.987    Disk 0 Vendor: WDC_WD50 05.0 Size: 476940MB BusType: 3
19:58:33.082    Disk 0 MBR read successfully
19:58:33.089    Disk 0 MBR scan
19:58:33.100    Disk 0 Windows 7 default MBR code
19:58:33.109    Disk 0 Partition 1 00     27 Hidden NTFS WinRE NTFS        17000 MB offset 2048
19:58:33.124    Disk 0 Partition 2 80 (A) 07    HPFS/NTFS NTFS          100 MB offset 34818048
19:58:33.128    Disk 0 default boot code
19:58:33.143    Disk 0 Partition 3 00     07    HPFS/NTFS NTFS       229918 MB offset 35022848
19:58:33.168    Disk 0 Partition 4 00     07    HPFS/NTFS NTFS       229920 MB offset 505894912
19:58:33.199    Disk 0 scanning C:\Windows\system32\drivers
19:58:40.724    Service scanning
19:58:58.479    Modules scanning
19:58:58.497    Disk 0 trace - called modules:
19:58:58.529    ntoskrnl.exe CLASSPNP.SYS disk.sys ACPI.sys storport.sys hal.dll nvstor64.sys
19:58:58.541    1 nt!IofCallDriver -> \Device\Harddisk0\DR0[0xfffffa80044ae470]
19:58:58.555    3 CLASSPNP.SYS[fffff8800194343f] -> nt!IofCallDriver -> [0xfffffa80043a37a0]
19:58:58.561    5 ACPI.sys[fffff88000f177a1] -> nt!IofCallDriver -> \Device\0000005c[0xfffffa80043a3060]
19:58:59.450    AVAST engine scan C:\Windows
19:59:01.459    AVAST engine scan C:\Windows\system32
20:01:24.788    AVAST engine scan C:\Windows\system32\drivers
20:01:42.908    AVAST engine scan C:\Users\Pilar
20:03:24.949    File: C:\Users\Pilar\AppData\Local\Temp\tex.exe  **INFECTED** Win32:Malware-gen
20:05:16.955    AVAST engine scan C:\ProgramData
20:07:27.179    Scan finished successfully
20:09:15.643    Verifying
20:09:25.672    Disk 0 Windows 601 MBR fixed successfully
20:11:05.842    Disk 0 (boot) \Device\Harddisk0\DR0 -> \Device\0000005c
20:11:05.857    Disk 0 Vendor: WDC_WD50 05.0 Size: 476940MB BusType: 3
20:11:06.039    Disk 0 MBR read successfully
20:11:06.044    Disk 0 MBR scan
20:11:06.048    Disk 0 Windows 7 default MBR code
20:11:06.059    Disk 0 Partition 1 00     27 Hidden NTFS WinRE NTFS        17000 MB offset 2048
20:11:06.082    Disk 0 Partition 2 80 (A) 07    HPFS/NTFS NTFS          100 MB offset 34818048
20:11:06.093    Disk 0 default boot code
20:11:06.109    Disk 0 Partition 3 00     07    HPFS/NTFS NTFS       229918 MB offset 35022848
20:11:06.135    Disk 0 Partition 4 00     07    HPFS/NTFS NTFS       229920 MB offset 505894912
20:11:06.241    Disk 0 scanning C:\Windows\system32\drivers
20:11:22.910    Service scanning
20:11:38.221    Modules scanning
20:11:38.244    Disk 0 trace - called modules:
20:11:38.278    ntoskrnl.exe CLASSPNP.SYS disk.sys ACPI.sys storport.sys hal.dll nvstor64.sys
20:11:38.292    1 nt!IofCallDriver -> \Device\Harddisk0\DR0[0xfffffa80044ae470]
20:11:38.305    3 CLASSPNP.SYS[fffff8800194343f] -> nt!IofCallDriver -> [0xfffffa80043a37a0]
20:11:38.313    5 ACPI.sys[fffff88000f177a1] -> nt!IofCallDriver -> \Device\0000005c[0xfffffa80043a3060]
20:11:38.916    AVAST engine scan C:\Windows
20:11:44.324    AVAST engine scan C:\Windows\system32
20:13:41.390    AVAST engine scan C:\Windows\system32\drivers
20:13:51.014    AVAST engine scan C:\Users\Pilar
20:15:08.494    File: C:\Users\Pilar\AppData\Local\Temp\tex.exe  **INFECTED** Win32:Malware-gen
20:16:34.225    AVAST engine scan C:\ProgramData
20:17:32.146    Scan finished successfully
20:21:40.551    Disk 0 MBR has been saved successfully to "C:\Users\Pilar\Documents\MBR.dat"
20:21:40.556    The log file has been saved successfully to "C:\Users\Pilar\Documents\aswMBR.txt"


pero lo vuelvo a pasar y siempre me sale el archivo infectado, alguien sabe por que?