anti virus - Removing a rootkit from the MBR.. without formatting?

I have run hitman pro and found 'traces of the TDL3 Alureon' rootkit on the computer. However, running TDSSKiller would of solved this issue - but - apparently the symptoms keep coming back so I decided to scan using COMBOFIX. I have run it once, it found a rootkit on the MBR. Rebooted the computer, the symptoms were still there. I ran COMBOFIX again, still detecting the rootkit. Is there a way to get rid of it without having to format the hard disk? Here is the log message:

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Stealth MBR rootkit/Mebroot/Sinowal detector 0.3.7 by Gmer, http://www.gmer.net

device: opened successfully
user: MBR read successfully
called modules: ntoskrnl.exe catchme.sys CLASSPNP.SYS disk.sys ACPI.sys hal.dll >>UNKNOWN [0x86EE3ACE]<< 
kernel: MBR read successfully
detected MBR rootkit hooks:
\Driver\Disk -> CLASSPNP.SYS @ 0xf7605f28
\Driver\ACPI -> ACPI.sys @ 0xf7578cb8
\Driver\atapi -> atapi.sys @ 0xf750a852
\Driver\iaStor -> iaStor.sys @ 0xf7477918
IoDeviceObjectType -> DeleteProcedure -> ntoskrnl.exe @ 0x805e710a
 ParseProcedure -> ntoskrnl.exe @ 0x80578f7a
\Device\Harddisk0\DR0 -> DeleteProcedure -> ntoskrnl.exe @ 0x805e710a
 ParseProcedure -> ntoskrnl.exe @ 0x80578f7a
NDIS:  -> SendCompleteHandler -> 0x0
 PacketIndicateHandler -> 0x0
 SendHandler -> 0x0
user & kernel MBR OK 

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Answer

Use boot manager repair procedure for your operating system. It should overwrite MBR data, so you should be safe. Just to be safe you could repeat procedure several times.