How to Dual Boot Two Versions of Windows

1. Install the oldest version of Windows you want on one of the partitions/disks.
   
2. Install the other version of Windows on the other partition/disk.
3. These two versions of Windows create entries in your boot.ini on your first drive.
4. Upon startup, you will get the OS selection screen asking which version of Windows you want to boot.
5. chose which windows to boot by selecting with the arrow keys and confirm with the enter key