Can I have Mount and Blade on two computers?

I just bought Mount and blade napoleonic wars on my laptop and was gonna get it for my desktop but every time i put in the activation code, it says "Activation Denied!" I tried manual instalation and that still didnt work. I bought mount and blade warband on steam, but Mount and blade napoleonic wars straight from talewords,com.

I have used MB, Warband and NW on several different laptops and computers and haven't had any problems with it.
In your case however, the problem is that you bought the games on different platforms. Though the trick that I gave you in your other thread should work.