I have 4 choices for OS's, 3 on first boot screen (Winows 7, Backtrack 5, and Ubuntu Studio 10.04). Backtrack and Studio are problematic and I wish to erase all traces of them but leave my Windows 7 and Ubuntu 12.xx wubi intact. What is the best way to go about this? Thanks!
This is a little awkward. One way could be to erase all files that belong to Backtrack and Studio...and than also modify grub to delete that two options.
Probably better way would be to try out that OS Uninstaller software.
Be careful from where you run it. I recommend you to use live system for that.