I was trying to access this pc on our subnet and could ping it and access it 100%. Then I tried to run a program off the PC I was trying to access, at this point windows popped open a window asking me if I wanted to block the incoming connection (firewall). I told it to unblock and once I did that I can no longer ping that PC from the computer I was using.
I can ping it just fine from everywhere else in the network. Just not that one computer now.
I turned off the windows firewall but no luck! I never rebooted the PC and some setting has changed....
What is the reason for this?