|Chances are your router is going bad. I would recommend trying a different router if you can borrow one for a few days to test and see. If you can't borrow, buy one and keep the receipt, then if it doesn't work any better, you can return it.|
If you get the same result with a different router, chances are it's something going on with your provider and you'll have to call their support line.
I should have mentioned it may be the network interfaces on the computers themselves too. If it's not the router, definitely ensure the computers have the most up-to-date drivers for their NIC's and try changing the port the computer plugs into on the switch with another wired PC that isn't having an issue
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.
message edited by Curt R