I did as you suggested, with the following outcome:

aswMBR version 0.9.4 Copyright(c) 2011 AVAST Software
Run date: 2011-04-28 10:51:48

10:51:48.046 OS Version: Windows 5.1.2600 Service Pack 3
10:51:48.046 Number of processors: 2 586 0x1C02
10:51:48.046 ComputerName: CALIGARI UserName: niceno
10:51:48.625 Initialize success
10:51:53.468 Disk 0 (boot) \Device\Harddisk0\DR0 → \Device\Ide\IdeDeviceP0T0L0-3
10:51:53.468 Disk 0 Vendor: ST9160310AS 0303 Size: 152627MB BusType: 3
10:51:55.468 Disk 0 MBR read successfully
10:51:55.468 Disk 0 MBR scan
10:51:57.468 Disk 0 scanning sectors +312576705
10:51:57.515 Disk 0 malicious Win32:MBRoot code @ sector 312576708 !
10:51:57.515 Disk 0 PE file @ sector 312576730 !
10:51:57.515 Disk 0 scanning C:\WINDOWS\system32\drivers
10:52:07.968 Service scanning
10:52:09.187 Disk 0 trace - called modules:
10:52:09.437 ntkrnlpa.exe CLASSPNP.SYS disk.sys ACPI.sys hal.dll atapi.sys pciide.sys PCIIDEX.SYS
10:52:09.437 1 nt!IofCallDriver → \Device\Harddisk0\DR0[0x86d75ab8]
10:52:09.453 3 CLASSPNP.SYS[f7588fd7] → nt!IofCallDriver → \Device\00000077[0x86d589e8]
10:52:09.453 5 ACPI.sys[f741f620] → nt!IofCallDriver → \Device\Ide\IdeDeviceP0T0L0-3[0x86d5cd98]
10:52:09.453 Scan finished successfully