I bought this A8 new from Amazon about a month ago.  I updated the firmware to the latest version when I installed it.  Everything

worked fine except for one device (a Dell Inspiron desktop PC) connected via Wifi.  The connection is intermittent and slow when it works.

It connects fine via ethernet.  I troubleshooted with Dell and they finally had me take the desktop somewhere else and connect to a different 

Wifi network.  It worked fine on that network.  I have 11 other devices connected to this A8 via Wifi and they all work fine.  It's just this

one desktop PC. I've tried chaging channels and bandwidth and nothing seems to help.  I can put a laptop right beside the destop and get

12-15 mbps consistently.  But the desktop gets at most about 5 mbps when it is working at all.  I don't know what else to try.  Oviously the

Wifi adapter in the Dell is working because everything checked out on the other wireless network.