My new Asus P8Z77 with Windows 8 64-bit disconnects from the network connection once I start to upload data. Downloads are fine and blazing fast. I have a Netgear router but upload works fine from all my other computers connected to it. I've upgraded to the latest drivers on the Asus site and even tried to roll back to older ones. I do note that it takes a few seconds for the upload to disconnect the computer from the network. Some limited data will go through but it generally cuts out after 10 seconds. Thoughts?