your on 60meg.
when testing max speeds do it via ethernet not wireless. try > www.speedtester.bt.com/
whats the specs of your wired desktop system? and laptop?
download inSSIDer onto a wireless capable device/laptop and run the program. itll scan for all reachable networks. note which channel each uses then set your network to use a channel that isnt in use. the channel numbers will range from 1-13.
to change wireless channels on the SH...
log into your SH. put this into your web browser and hit enter
click on advanced settings below the 3 box
then wireless settings within the left hand column.
also test changing mode from 300 to 145.