How do I get rid of the mbr on an external disk

This weekend I was working on a pc that had a boot sector virus. Before working on the computer I cloned the disk with Acronis True Image Home 10 just in case I needed to get back where I started. I'd now like to know that the disk I cloned doesn't have the boot sector virus. Is there a way with XP or Vista to make this happen. I'm thinking something could be done in Disk Administrator like intitalizing the disk again, or something. I used Acronis' drive cleanser to overwrite all data on the drive with zeroes, but I don't know if this includes the mbr.

Thanks,
bwierzbickiAsked:
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Dr. KlahnConnect With a Mentor Principal Software EngineerCommented:
If Acronis wrote zeroes to the entire disk, then the MBR was also overwritten.  However, if you want to be doubly sure, MBRFix should do the job.  It can backup, restore and overwrite MBRs.

http://www.sysint.no/products/Download/tabid/536/language/en-US/Default.aspx

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hello_everybodyCommented:
If the cloned disk is bootable (it should be!) then follow these instructions to Repair the OS: http://helpdeskgeek.com/how-to/fix-mbr-xp-vista/
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wafischerConnect With a Mentor Commented:
Zeroing the Disk will erase the MBR as DrKlahn states.  If you want to do another pass then install the questionable hard drive as a secondary hard drive in a system, if it is not already.
Open a command prompt from within Windows XP.
Type diskpart
list disk

**The computers hard disks will be listed. Find the correct Disk # based on size.
Disk ### Status Size Free Dyn Gpt
-------- ---------- ------- ------- --- ---
Disk 0 Online 75 GB 0 B
Disk 1 Offline 500 GB 500GB

Type select disk 1
clean

**After the operation has completed, type exit, then close DOS. This will wipe the drive as well.
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