Do I need 2 copies of windows to sometimes boot in to bootcamp and run a windows program and sometimes but into bac and run parallels? Thanks very much for any information!
If you install Windows using Boot Camp, then you can use the same installation of Windows in Parallels by telling Parallels to use the Boot Camp disk as the virtual machine's hard disk. Look for "Using the Boot Camp Partition in a Virtual Machine" in the Parallels Desktop Help for more information.