I have an issue with one of my computers on the network... It is randomly dropping internet connection, but the rest of the computers one the router are fine. The odd thing is that when the internet connection goes down for that single computer, i can see the rest of the network just fine.
I'm not sure if this is a software, hardware, or router issue. I have replaced the network cable on it recently and am waiting to see if that has any affect (which i doubt it will.)
If you're losing pings to the internet, it may be your router/cable modem.
If you're losing pings to your local lan, then it can be your NIC or switch, or just another bad cable. Try it on all your computers.
I don't think its the router or cable modem because as stated previously, the other computers on the router work fine.
I tried the ping and they all failed, INCLUDING the pings to the router and other computers... however when i went onto the workgroup over the network i was still able to access the other computers, pull and push files between computer, etc.