Parallel process with windows 10?

I have two computers I would like to combine and parallel process with 10 into one desktop computer. Can this be done?

Welcome to the forum.

This is known as distributed computing and is a viable idea - but only for some kinds of applications and not what most people would be using. In most applications the advantages of distributed processing are overwhelmed by the overhead of communication between the computers.

What exactly are you hoping to accomplish with this?

Note that my knowledge of this is strictly theoretical with no practical experience.