I have a bunch of old pcs. How can I make them into a cluster pc?

[kaidemarco]

HI, I have three old pcs, fully working, that i would like to make one working computer able to run windows or mintos. How would I go about that? I would like to physically connect them as well.

 

[James Mason]

It'll run like garbage even if you get it working.
Windows isn't designed for cluster computing, only specifically made scientific calculation software is.

 

[ss202sl]

Pick the best one.... and load Windows on it.

Sell all 3 of them, and buy a better one.

 

[COLGeek]

You could build/config a Beowulf cluster:

https://www.linux.com/blog/building-beowulf-cluster-just-13-steps

However, this isn't Windows and as James points out is very likely NOT to help you as stated.