|I may just have to disable the on-board LAN controller and switch to a third party card, but I hate to occupy an expansion slot with a redundant device.|
Please tell me you don't have both a wired, and a wireless interface enabled and connected on the same PC at the same time???
If you do, that's probably part of your problem. Windows get's a serious headache if you have both enabled and connected at the same time. Disable whichever one you don't want to use and then see if things don't improve.
Luckily both your interfaces are likely on the same subnet. If they were different subnets, with different gateway's then your PC would just stop communicating altogether.
Oh and do try a different network cable as suggested by sluc If you can swap the cable between another computer that's working properly and the one that isn't, then you can see if the issue goes with the cable or remains on the original PC.
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