TechSpot posted a guide about removing your Windows 7 installation
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.Removing your Windows 7 installation, partition
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.