Running Win10 & WinXP in same computer on 2 separate HDD

[Clc1]

I have a Dell Inspiron as a spare that I put an SSD running WinXP for a specific program I couldn't update for use in a Win7 environment.

I took out the SSD and put back the OEM Dell HDD and wiped it clean, installed Win7 and then went to the free upgrade to Win10.

Is there an easy way to put the SSD back into the box and boot into the WinXP to use the program while still retaining the Win10 HDD? It also has to see the Hasp Sentinel key for the program to work when in WinXP.

UPDATE: Seeing the answers I'm getting I think a clarification is needed. I could be misunderstanding, as my knowledge on this subject is nil.
The reason for the WinXP usage is because the architectural program I have will only work with a hasp key and that will only be recognized working under WinXP. I couldn't afford to update the program for work in Win7 environment.
So the question is how to set the machine up to be able to run the program as designed in WinXp without making the WinXP the primary OS but making the program think it is so it will run.

 

[basroil]

Can you? Yes, if it worked in Win 7 then it'll work in Win 10.

For what you are discussing though, it's recommended you get VMWare's virtualization software and simply run as a VM with USB passthrough. XP will kill your SSD and never really manage to keep up with the SSD, even 7 isn't as good as 8/10 when it comes to SSD management.

 

[azaran]

You can run two hard drives in the same computer. You can use a tool like Easy BCD to run it
http://neosmart.net/EasyBCD/
or learn how to use BCDedit manually. The tool is likely going to make life easier however.
Either way, you need the Windows 10 drive as the primary boot device and the XP drive as the secondary when you set it up. From there, use the BCD editing tool and you "should" be good to go.

That said, Basroil is right, if you can do it in a VM then it'll make life much easier. VMWare has a free program, as does Oracle.
http://www.vmware.com/products/player.html
https://www.virtualbox.org/

 

[why_wolf]

agree with others run the XP as a virtual machine. no real reason to run it as a physical box.