Yes, the Network Filter is off and all MAC addresses are cleared. This was the setting I had it at, therefore is not a source of the conflict.
I should report that yesterday I spent over 8 hours troubleshooting this issue and I gave up and installed an ethernet cable.
Some of the things I did:
Varied the interval scan for validity from the default (60) to 120 and down to 20... no change.
Removed and reinstalled drivers and card.
Updated to latest drivers.
Disabled and re-enabled the connection.
Used Windows to attempt repair.
Not to mention numerous attempts to repair using Network Magic.
Disabled Network Magic.
Examined Services... disabled some thought to be unnecessary.
Hardware Device properties show card working, no conficts, etc.
>>> But I did notice that while using the DLink Wireless Connection Utility, that although the wireless connection would not assign an IP, the little circle over the SSID icon would blink off and back on every 10 seconds. (This corresponds to the connectivity dropout)
I forced an IP assignment by setting my router assignment to static. The IP gets assigned, the connection is made, but still cannot log onto the internet. In the meantime that little circle keeps dropping every 10 seconds. I show 4 full green bars and network connected, but no ability to access the internet.
In the meantime, my DWA-556 is working fine on my Intel computer. This DWA-552 was working on the Intel box before swapping to the ChainTech/AMD machine. I can't swap the DWA-556 because the Chaintech does not have PCIexpress slots.