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Setting Up A Dual Boot System

Solution
As always, this depends.

1. Do you have multiple drives? What sizes?
2. Want an OS on each?
3. How do you want to be able to select which OS?
4. You have an individual license for each, right?
As always, this depends.

1. Do you have multiple drives? What sizes?
2. Want an OS on each?
3. How do you want to be able to select which OS?
4. You have an individual license for each, right?
 
Solution


No, you cannot use the same Win 8.1 license for 8.1 and 10.
One or the other.
 


1 license, 1 PC, 1 install at a time. Unless you have purchased something other than a standard OEM or Retail license.