The user's small office environment has a plenty-fast connection when tested on my laptop with a cable going to their router, where I am getting 36mbps download using speedtest.net. In contrast, if I run the test via their wireless connection I only get about 1mbps. This is coming from the wireless connection in their comcast router. My laptop showed a 'good' or 'excellent' signal strength. This same laptop always gets fast throughput on fast wireless connections, so I assume it really is a problem there at their office. They have had the same problems with their wireless devices--which is why they called me to check it out.
Generally speaking, what can cause such speed discrepancies? More importantly, what can I do to greatly improve their wireless speeds? Should I disable the wireless connection in their router, and add an access point? TIA