*Removing your Windows 7 installation, partition*

http://www.techspot.com/guides/144-removing-windows7/

The strongest critique we received about our recent guide on dual booting
Windows 7 with XP/Vista was that we should've included information covering
the likely event of you wanting to kick the beta OS to the curb, sooner or
later.

Well, we couldn't agree more, so as a follow up to that guide we're going to
look at the reverse process; deleting your Windows 7 partition and
reallocating its hard drive space to another partition.

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