@2SS-Capt,

Its defintely not an expected behavior, but I have a feeling that the older network card may be a factor here.

With the upgrades that came since Wireless N, there have been quite a few changes affecting how devices are able to communicate directly with each other over the network. For your laptops wireless connection, I would recommend turning off any advanced features such as Fast Roaming, as older network cards can experieince difficulties, but it is not very common anymore. 

Do you have your PC wired directly into your Decos? Could it be possible that a wired network switch is interfering with the transfer?

On an advanced note, you can use your command console to run tracert commands to a website or device. This will show each step along the data's path and may be able to point you towards a problematic link.