New
#41
Even with the disk used for seeing ubuntu installed you have one form of GParted seen for wiping the drive and seeing a fresh NTFS primary created for a nice clean 7 install. The rest is simply following the remaining steps in the guides written specifically for seeing 7 installed one way or another.
If you still wanted ubuntu on as well you would shrink that down if needed and move the root partition(system) back towards the rear of the drive allowing space for the new MS primary for 7. Once 7 is on you would then use the NeoGrub option in EasyBCD for adding an entry for the distro into the 7 boot loader.
Now if you only want to see 7 on and ubuntu gone the methods have already been discussed. You now simply have to decide which route to go. A dual boot or a 7 stand alone install? The information is there.