Recovery and MBR

I recently purchased a Sartellite Core I7 with Win7 64bit installed. I don't have the exact model number since I am posting from a different machine. Anyway here is my situation: I recently contracted a rootkit (Alureon.A). My automatic update began failing and started popping an error describing what was wrong. I followed links and downloaded software to remove it. Nothing seemed to remove it and since the computer was so new I just decided to use the recovery partition on the hard drive. It installed perfectly and the computer is as good as new. My question is: Did the recovery completely overwrite and create a new master boot record, effectively getting rid of the rootkit? I prefer not to wipe the drive to DoD standards since the drive is over 500GB in size. Quite a lengthy process and it would destroy my recovery partition.
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Did the recovery completely overwrite and create a new master boot record, effectively getting rid of the rootkit?
Yes. The recovery process restores every byte on the hard disk. The MBR resides in the first sector.
The recovery does not affect the BIOS, however.
-Jerry

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