i have question, i put two set of windows on my computer and i would like to know if there is a way to delete just one set of windows without having to reformat my computer???
You could just change the boot options, then delete the files. To change the boot options, go: Control Panel > System > Advanced > Startup and Recovery (Settings) From there you can set the default OS, change countdown options, etc. You can also delete references to systems by clicking "Edit". What kind of a problem are you having with having two OSes (HD space, etc.)?