Relay turns on when computer is disconected

Then wiring diagram was for illustration purpose only it was the first time I had used fritzing.

This is like asking your girlfriend to marry you, and then when she has told everyone and booked the wedding and sent out the invitations you say “that wasn’t a proposal that was just what I would say if I were to propose “

In electronics “illustration purpose“, without saying it is such, is just like the above example, it is lying.

After buying some relays of different makes I found this problem was only relative to this certain type of relay and not to others, strange.

Not strange at all, it is just that you don’t understand what you are doing and do not know what is right and what is wrong.