A true dual-boot is using the Grub Boot Menu and selecting Windows as last on
the list usually. Within Windows is either as a virtual OS or on the NTFS hard
drive as a directory, which is a temp deal as a trial with limitations, as you
may be discovering.

As a beginner I tried dual-booting through a Windows partitioning and menu
program, but Norton SystemWorks 2003 hosed Mandrake, if memory serves. So I
switched to multiple hard drives or computers running various OS installs.