Deleting Multiple Windows Partitions

So i put two partitions of windows on my mac, one using boot camp and one using vmware fusion. Once i connected to the internet on both of them, i was hit by some MAJOR viruses. I am done with windows and want to delete all partitions and be clean. I cant seem to figure out how to delete them though. When i open the bootcamp assistant, it doesnt give me the option to restore or remove partitions, only installation. I saw that you might have to use disk utility to delete them, but i the partitions dont show up on the hard drive, only the "mac" partition. i know that the partitions are still there because i can still use them. How do i get these darn things off my computer without reformatting it? Is that what it comes down to? Also, i heard something about first and second disk partition and that can make a difference, but i have no idea what they are talking about. A little insight would help a poor fellow out. Thanks!

You cannot use Boot Camp once you change the number of partitions on the drive. Boot Camp only works on a drive that has one partition prior to creating the Boot Camp partition. Now that you created a third partition you removed the ability of Boot Camp to delete its partition. You did read the Boot Camp documentation?
You need to backup your OS X partition by creating a bootable backup to an external Firewire drive. Then repartition your hard drive and clone your system back from the external drive. You can create the clones using the Restore option of Disk Utility. Be sure you use DU to repair the hard drive and permissions before cloning. Your external drive should be erased prior to cloning.

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