i feel like a uber n00b now....

To whom does this network actually belong? if it really IS YOURS, how do you expect to inadvertently access the network of another company?
sorry i just found out that the scan result in all my active network machines....

so heres the question
"APR enables you to hijack IP traffic between the selected host on the left list and all selected hosts on the right list in both directions. If a selected host has routing capabilities WAN traffic will be intercepted also. Please note that since your machine has not the same performance of a router you could cause DoS if you set APR between your Default Gateway and all other hosts on your LAN."

how fast is a router? why cant my machine be fast enough?

look plz dont panic....i was under the false impression that the left side was some kinda router and the right side was the list of machines connected to it....(i assumed that from the cain video from irongeeks)