-I have access to free electricity and a couple dozen Windows pc units. I'll post the specs at the end.
-What I want to know is, what is the easiest or most profitable cryptocurrency to mine?
-I do not have any money to buy any extra equipment or do any upgrades.
-Please point me to a guide on how to mine whatever you suggest.
SPECS.
CPU: i3-3110M 2.40GHz
Ram: 4GB
GPU:
https://ribletjorb.tumblr.com/image/163358130871Usually, i'd say it was best to mine some altcoins using your GPU, but looking at that screenshot, it looks like it's a GPU that's embedded on your motherboard.
Your best shot might be to mine CPU-only altcoins, altough i wouldn't expect much profit from them.
If i were you, i'd close this topic, and open a new one in the altcoin mining subforum, specifically asking which altcoin you can mine with an i3. Expect very little profits, expect huge power draw, expect possibly shortened lifespan from your hardware (untested)